Identifier checkdigit (rule category)

Property	Value
The human-friendly name shown for this concept in the user interface, used instead of the technical name to improve readability and understanding. Display name	Identifier checkdigit
Informal and comprehensive human-readable definition of a concept. Description	When we know for a certain identifier that it comprises a checksum or checkdigit, we validate whether the identifier is consistent with respect to this checksum or checkdigit.
Dimensional categorization of a concept, e.g., a data quality dimension of a data quality rule. Dimension	Accuracy
Hierachical parent concept of a concept. Parent	Checkdigit (rule category)

Data quality rules

Rule	Country	Description	Criticality
Checkdigit of state tax number (Brasil - Acre (AC))	BR (Brazil)	This rule checks the checkdigit of the state tax number as defined for the administrative area Acre in Brazil	INFO
Checkdigit of state tax number (Brasil - Alagoas (AL))	BR (Brazil)	This rule checks the checkdigit of the state tax number as defined for the administrative area Alagoas in Brazil	INFO
Checkdigit of state tax number (Brasil - Amapa (AP))	BR (Brazil)	This rule checks the checkdigit of the state tax number as defined for the administrative area Amapa in Brazil	INFO
Checkdigit of state tax number (Brasil - Amazonas (AM))	BR (Brazil)	This rule checks the checkdigit of the state tax number as defined for the administrative area Amazonas in Brazil	INFO
Checkdigit of state tax number (Brasil - Bahia (BA))	BR (Brazil)	This rule checks the checkdigit of the state tax number as defined for the administrative area Bahia in Brazil	INFO
Checkdigit of state tax number (Brasil - Ceara (CE))	BR (Brazil)	This rule checks the checkdigit of the state tax number as defined for the administrative area Ceara in Brazil	INFO
Checkdigit of state tax number (Brasil - Espirito Santo (ES))	BR (Brazil)	This rule checks the checkdigit of the state tax number as defined for the administrative area Espirito Santo in Brazil	INFO
Checkdigit of state tax number (Brasil - Federal District (DF))	BR (Brazil)	This rule checks the checkdigit of the state tax number as defined for the administrative area Federal District in Brazil	INFO
Checkdigit of state tax number (Brasil - Goias (GO))	BR (Brazil)	This rule checks the checkdigit of the state tax number as defined for the administrative area Goias in Brazil	INFO
Checkdigit of state tax number (Brasil - Maranhao (MA))	BR (Brazil)	This rule checks the checkdigit of the state tax number as defined for the administrative area Maranhao in Brazil	INFO
Checkdigit of state tax number (Brasil - Mato Grosso (MT))	BR (Brazil)	This rule checks the checkdigit of the state tax number as defined for the administrative area Mato Grosso in Brazil	INFO
Checkdigit of state tax number (Brasil - Mato Grosso do Sul (MS))	BR (Brazil)	This rule checks the checkdigit of the state tax number as defined for the administrative area Mato Grosso do Sul in Brazil	INFO
Checkdigit of state tax number (Brasil - Minas Gerais (MG))	BR (Brazil)	This rule checks the checkdigit of the state tax number as defined for the administrative area Minas Gerais in Brazil	INFO
Checkdigit of state tax number (Brasil - Para (PA))	BR (Brazil)	This rule checks the checkdigit of the state tax number as defined for the administrative area Para in Brazil	INFO
Checkdigit of state tax number (Brasil - Paraiba (PB))	BR (Brazil)	This rule checks the checkdigit of the state tax number as defined for the administrative area Paraiba in Brazil	INFO
Checkdigit of state tax number (Brasil - Parana (PR))	BR (Brazil)	This rule checks the checkdigit of the state tax number as defined for the administrative area Parana in Brazil	INFO
Checkdigit of state tax number (Brasil - Pernambuco (PE))	BR (Brazil)	This rule checks the checkdigit of the state tax number as defined for the administrative area Pernambuco in Brazil	INFO
Checkdigit of state tax number (Brasil - Piaui (PI))	BR (Brazil)	This rule checks the checkdigit of the state tax number as defined for the administrative area Piaui in Brazil	INFO
Checkdigit of state tax number (Brasil - Rio Grande do Norte (RN))	BR (Brazil)	This rule checks the checkdigit of the state tax number as defined for the administrative area Rio Grande do Norte in Brazil	INFO
Checkdigit of state tax number (Brasil - Rio Grande do Sul (RS))	BR (Brazil)	This rule checks the checkdigit of the state tax number as defined for the administrative area Rio Grande do Sul in Brazil	INFO
Checkdigit of state tax number (Brasil - Rio de Janeiro (RJ))	BR (Brazil)	This rule checks the checkdigit of the state tax number as defined for the administrative area Rio de Janeiro in Brazil	INFO
Checkdigit of state tax number (Brasil - Rondonia (RO))	BR (Brazil)	This rule checks the checkdigit of the state tax number as defined for the administrative area Rondonia in Brazil	INFO
Checkdigit of state tax number (Brasil - Roraima (RR))	BR (Brazil)	This rule checks the checkdigit of the state tax number as defined for the administrative area Roraima in Brazil	INFO
Checkdigit of state tax number (Brasil - Santa Catarina (SC))	BR (Brazil)	This rule checks the checkdigit of the state tax number as defined for the administrative area Santa Catarina in Brazil	INFO
Checkdigit of state tax number (Brasil - Sao Paulo (SP))	BR (Brazil)	This rule checks the checkdigit of the state tax number as defined for the administrative area Sao Paulo in Brazil	INFO
Checkdigit of state tax number (Brasil - Sergipe (SE))	BR (Brazil)	This rule checks the checkdigit of the state tax number as defined for the administrative area Sergipe in Brazil	INFO
Checkdigit of state tax number (Brasil - Tocantins (TO))	BR (Brazil)	This rule checks the checkdigit of the state tax number as defined for the administrative area Tocantins in Brazil	INFO
Identifier checkdigit invalid (CPF number (Brazil))	BR (Brazil)	This rule checks the checkdigit of CPF number (Brazil).	ERROR
Identifier checkdigit invalid (CVR number (Denmark))	DK (Denmark)	This rule checks the checkdigit of CVR number (Denmark).	ERROR
Identifier checkdigit invalid (Company identification number (Switzerland))	CH (Switzerland)	The last digit is a MOD11 checksum digit build with weighting pattern: 5,4,3,2,7,6,5,4. The rule allows for any valid formatted CH UID, in case of an invalid format (see Identifier format invalid (Company identification number (Switzerland))) the rule will fail directly.	ERROR
Identifier checkdigit invalid (DEA Registration Number (United States))	US (United States of America)	This rule checks the checkdigit of DEA Registration Number (United States) according to the following the logic: DEA number without checkdigit: AL455178 To find the checkdigit the following steps are required: Add the first, third, and fifth digits 4 + 5 + 7 = 16 Add the second, fourth, and sixth digits – then multiply x 2 5 + 1 + 8 = 14 x 2 = 28 Add these two totals together 16 + 28 = 44 The second digit of this total number is the check digit, here 4 Any difference results in a violation of this rule	ERROR
Identifier checkdigit invalid (DIC number (Czech Republic))	CZ (Czechia)	This rule checks the checkdigit of the DIC number (Czech Republic).	ERROR
Identifier checkdigit invalid (European value added tax identifier (Czech Republic))	CZ (Czechia)	This rule checks the checkdigit of the European value added tax identifier (Czech Republic).	ERROR
Identifier checkdigit invalid (GST number (India))	IN (India)	This rule checks the check digit of the Goods and Services Tax number (GST) in India. The first fourteen digits of the GST are the GST number (India). calculate a hash of each digit of GST number. Steps for calculation of hash are mentioned below: a) Obtain corresponding code [C] for each alphanumeric digit of GST number. The codes for each alphanumeric characters are as following: 0 -> 0 1 -> 1 2 -> 2 3 -> 3 4 -> 4 5 -> 5 6 -> 6 7 -> 7 8 -> 8 9 -> 9 A -> 10 B -> 11 C -> 12 D -> 13 E -> 14 F -> 15 G -> 16 H -> 17 I -> 18 J -> 19 K -> 20 L -> 21 M -> 22 N -> 23 O -> 24 P -> 25 Q -> 26 R -> 27 S -> 28 T -> 29 U -> 30 V -> 31 W -> 32 X -> 33 Y -> 34 Z -> 35 b) Multiply “code” with a number called Multiplier [M], which will be 1 for odd digits and 2 or even digits of GST Number. c) So on multiplication of “code” with “multiplier” [ C x M ] we get a number called Product [P]. d) Divide “product” with 36 [ P ÷ 36]. This division yields us a Quotient [Q] & a Remainder ['R]. e) Add “quotient” and “remainder” [ Q + R ] to get Hash of that digit of GST number. Repeat the above steps for each digit of GST number, and obtain corresponding hash. After that, derive the checksum digit with below-mentioned steps: For these 14 digits the check digit is calculated, in the following way: Add hash of all 14 digits calculated above to get Sum [S] Now divide “Sum” with 36 and obtain its Quotient [Z] Subtract from 36 the quotient obtained above [' 36 - Z ] to yield checksum code [Y] Lookup corresponding alphanumeric digit for the checksum code [Y] obtained in the above step, which is GST Number Checksum Digit	ERROR
Identifier checkdigit invalid (Global location number)	WORLD (World)	This rule checks the checkdigit of Global location number.	ERROR
Identifier checkdigit invalid (ICO number (Czech Republic))	CZ (Czechia)	This rule checks the checkdigit of the ICO number (Czech Republic).	ERROR
Identifier checkdigit invalid (NIF number (Portugal))	PT (Portugal)	This rule checks the checkdigit of NIF number (Portugal).	ERROR
Identifier checkdigit invalid (NIP number (Poland))	PL (Poland)	This rule describes the algorithm for checksum digit (the last 10th digit) for NIP number (Poland) using the following logic: 1) multiply the fist 9 digits of the NIP by the corresponding wages: 6, 5, 7, 2, 3, 4, 5, 6, 7 2) sum up the result of the multiplication from step one 3) calculate modulo 11.	ERROR
Identifier checkdigit invalid (NIT number (Colombia))	CO (Colombia)	This rule checks the checkdigit of NIT number (Colombia).	ERROR
Identifier checkdigit invalid (National Provider Identifier (United States))	US (United States of America)	This rule checks the checkdigit of National Provider Identifier (United States) according to the following the logic: Step 1 - Starting at the right most digit, which should be the check digit. Double the value of every second digit. Step 2 - Take the sum of all the individual digits. Step 2a - If a doubled value is 2-digits (i.e. 8 was doubled to 16), you add the two digits together (i.e. the doubled value of 16 would be: 1 + 6) Step 3 - Add 24 to the value Step 4 - Take the units digit (i.e. if the number was 67, you would take 7). Step 5 - Subtract the units digit from 10. (Do this step only if the units digit isn't zero) Step 6 - The resulting number is the check digit. Any difference results in a violation of this rule	ERROR
Identifier checkdigit invalid (National business register identifier (Austria))	AT (Austria)	This rule checks the checkdigit of National business register identifier (Austria) according to the following the logic: 1) apply the weight number to each identifier's number 2) calculate a sumproduct of the identifier's number and respectful weight digit 3) sum up the result 4) apply modulo 17 the summed up result 5) lookup the rest number of the modulo 17 in a reference table ---> checksum letter. Any difference result in a rule violation.	ERROR
Identifier checkdigit invalid (Organization Number (Norway))	NO (Norway)	This rule checks the checkdigit of Organization Number (Norway).	ERROR
Identifier checkdigit invalid (Organization Registration Number (Sweden))	SE (Sweden)	This rule checks the checkdigit of the Organization registration number (Sweden). The checksum is calculated according to the Luhn algorithm.	ERROR
Identifier checkdigit invalid (Quebec Sales Tax number (Canada))	CA (Canada)	This rule checks the checkdigit of the Quebec Sales Tax number (Canada). The checksum is done in the following way: a) starting from the ninth digit multiply each digit by the factor. The factors form a circular secuence of values 2 through 7, beginning on the right b) sum up the result c) divide the result by 11 (183/11) = 16 reste 7 If the reminder is 0, the check digit is 1. If the reminder is 1, the check digit are 0. For any other reminder obtained, the check digit is the diference between 11 and the reminder. Subtract the reminder obtained from 11.	ERROR
Identifier checkdigit invalid (REGON (Poland))	PL (Poland)	This rule describes the algorithm for checksum digit (the last digit) for REGON identifier. Logic for 9-digits identifier: 1) multiply each of the first 8 digits by the gidit-wages: 8 9 2 3 4 5 6 7 2) sum up the numbers received in step 1 3) apply modulo 11. the rest is equal to the schecksum digit. For the 14-digits REGON identifier the logic is the same, but the wages for the first 13 digits are different: 2 4 8 5 0 9 7 3 6 1 2 4 8.	ERROR
Identifier checkdigit invalid (RIF number (Venezuela))	VE (Venezuela)	This rule checks the checkdigit of RIF number (Venezuela). The number consists of 10 digit with one leading letter, 8 random numbers and check digit. The first letter is the RIF kind that represents the kind of entity this RIF belongs to. This rule checks whether the identifier is valid with respect to the checkdigit. Format of RIF number (Venezuela) is: [ C1 C2 C3 C4 C5 C6 C7 C8 C9 C10 ], where: C1: Letter V: Venezuelan E: Foreigner J: Legal Entity C: Township or Communal Council P: Passport G: Government Entity C2...C9: Random numbers C10: Check digit The set of weightings is: M1 = (1	ERROR
Identifier checkdigit invalid (RUC number (Ecuador))	EC (Ecuador)	This rule checks the checkdigit of RUC number (Ecuador).	ERROR
Identifier checkdigit invalid (RUC number (Paraguay))	PY (Paraguay)	This rule checks the checkdigit of RUC number (Paraguay).	ERROR
Identifier checkdigit invalid (RUC number (Peru))	PE (Peru)	This rule checks the checkdigit of RUC number in Peru [C1,C2, C3, C4, C5, C6, C7, C8, C9, C10] - Every single digit in 10 digit input number has its corresponding weight: [5, 4, 3, 2, 7, 6, 5, 4, 3, 2] 1. Multiply every element from input number by corresponding weight: - C1 * 5 - C2 * 4 - C3 * 3 - C4 * 2 - C5 * 7 - C6 * 6 - C7 * 5 - C8 * 4 - C9 * 3 - C10 * 2 2. Sum up all of results (sumproduct) 3. The reminder of the modulo 11 4. Subtract restults from 11 5. Checkdigit = the reminder of modulo 10	ERROR
Identifier checkdigit invalid (RUT number (Chile))	CL (Chile)	This rule checks the checkdigit of RUT number (Chile).	ERROR
Identifier checkdigit invalid (RUT number (Uruguay))	UY (Uruguay)	This rule checks the checkdigit of RUT number (Uruguay).	ERROR
Identifier checkdigit invalid (Tax Identification Number (Serbia))	RS (Serbia)	9 digits (ex. 123456788) of which the first 8 are the actual ID number, and the last digit is a checksum digit, calculated according to ISO 7064, MOD 11-10	ERROR
Identifier checkdigit invalid (Tax Identification Number (Vietnam))	VN (Viet Nam)	This rule checks the checkdigit of Tax Identification Number (Vietnam).	ERROR
Identifier checkdigit invalid (Tax Registration Number (Belarus))	BY (Byelorussian SSR)	This rule checks the checkdigit of Tax Registration Number (Belarus) The number consists of 9 digits (numeric for organisations, alphanumeric for individuals). [C1,C2, C3, C4, C5, C6, C7, C8, CheckDigit] - Every single digit in 8 digit input number has its corresponding weight: weights = (29, 23, 19, 17, 13, 7, 5, 3) 1. Multiply every element from input number by corresponding weight: - C1 * 29 - C2 * 23 - C3 * 19 - C4 * 17 - C5 * 13 - C6 * 7 - C7 * 5 - C8 * 3 2. Sum up all of results (sumproduct) 3. Checdigit - The reminder of the modulo 11	ERROR
Identifier checkdigit invalid (Tax identification number (South Africa))	ZA (South Africa)	This rule describes the algorithm for checksum digit (the last digit) for Tax identification number (South Africa). Logic for 10-digits identifier: 1) The odd positioned digits of the tax reference number (1, 3, 5, 7 and 9) are multiplied by 2. If the answer is greater than 9 the digits are added together to get the calculated value. 2) Add these calculated values and the even positioned digits of the Tax reference number (2, 4, 6 and 8) together. 3) Subtract the last character of this calculation from 10 to get the check digit. If this is not equal to the last digit of the Tax reference number as entered, then this does not pass the modulus 10 test. The last character is a check digit, calculated by applying the following algorithm: When the result of the line item calculation exceeds 9, add the individual digits together to obtain a single digit result (e.g. 18=1+8=9) Digit 10: Check digit if the last digit of Total >0 Then The Checksum digit should be equal to the result of 0 (Total mod 10) if the last digit of Total = 0 Then the Checksum digit shuld be equal to zero	ERROR
Identifier checkdigit invalid (Tax number (Romania))	RO (Romania)	This rule checks the checksum of the Tax number in Romania. To calculate the checksum digit, every digit from CNP is multiplied with the corresponding digit in number 279146358279 the sum of all these multiplications is then divided by 11. If the remainder is 10 then the checksum digit is 1, otherwise it's the remainder itself. Any difference result in a rule violation.	ERROR
Identifier checkdigit invalid (Tax number (Turkey))	TR (Turkey)	This rule checks the checkdigit of Tax number (Turkey).	ERROR
Identifier checkdigit invalid (VAT number (Norway))	NO (Norway)	This rule checks the checkdigit of VAT number (Norway).	ERROR
Identifier checkdigit invalid (VAT registration number (Israel))	IL (Israel)	The rightmost digit is a check digit (using Luhn algorithm (https://en.wikipedia.org/wiki/Luhn_algorithm) ).	ERROR
Identifier checkdigit invalid (VAT registration number (Switzerland))	CH (Switzerland)	The last digit is a MOD11 checksum digit build with weighting pattern: 5,4,3,2,7,6,5,4. The rule allows for any valid formatted CH VAT ID, in case of an invalid format (see Identifier format invalid (VAT registration number (Switzerland))) the rule will fail directly.	ERROR
Invalid checksum of ABN AU (Australia)	AU (Australia)	The 11 digit ABN is structured as a 9 digit identifier with two leading check digits. This rule checks whether the ABN is valid with respect to the checkdigits. The leading check digits are derived using a modulus 89 (remainder after dividing by 89) calculation. Format of the BNA looks like this: [ C1 C2 C3 C4 C5 C6 C7 C8 C9 C10 C11 ] M11 ( C1 - 1 ) + M10 x C2 + M9 x C3 + M8 x C4 + M7 x C5 + M6 x C6 + M5 x C7 + M4 x C8 + M3 x C9 + M2 x C10 + M1 x C11 MOD89=0 The set of weightings are: M11...M1 = (10,1,3,5,7,9,1113,15,17,19)	ERROR
Invalid checksum of ACN AU (Australia)	AU (Australia)	This rule checks the checksum of the Australian Company Number. The ACN is a nine digit number with the last digit being a check digit calculated using a modified modulus 10 calculation.	ERROR
Invalid checksum of AR CUIT (Argentina)	AR (Argentina)	This rule checks the checksum of the CUIT number in Argentina. The last digit of the in total 11 digits of the CUIT is a check digit validated according the algorithm established by AFIP (Federal Tax Agency). This rule double checks whether the check digit is correct.	ERROR
Invalid checksum of BN CA (Canada)	CA (Canada)	The Canadian Business number consists of exactly 9 digits. It is important to be correct as it is used as part of the GST/HST number as well. For these 9 digits the checkdigit is calculated in the following way: a) Add all odd digits, except the 9th one b) String all even digits together and multiply by 2 c) Add all digits from the result b. together d) Add the result of a. and c. together e) Subtract the result of d. from the nearest 10 digit. The result of e. must equal the 9th digit.	ERROR
Invalid checksum of BTW NUMBER (Belgium)	BE (Belgium)	This rule checks the checksum of the BTW number in Belgium. The checksum calculations is done using modulo 97.	ERROR
Invalid checksum of CIF number (Spain)	ES (Spain)	This rule describes the algorithm for checksum letter for CIF number (Spain) using the following logic: 1) sum up the 7 digits of the CIF identifier --> Summa A 2) for each of the digits of the odd positions, multiply the digit by 2 and add the result numbers, but if the result has a single digit simply this figure is added. (ie if the digit is 6, the result would be 6 x 2 = 12 -> 1 + 2 = 3, more if the digit is 2, the result would be 2 x 2 = 4). --> Summa = B 3) add the result of the previous 2 steps. --> A + B = C 4) the last digit of the previous sum (C) is subtracted to 10, whose result would be the control code: if C = 14, the last digit is 4, so we would have 10 - 4 = 6. if the last digit of the previous step sum is 0 (eg C = 30), subtraction is not performed and 0 is taken as the control code	ERROR
Invalid checksum of CNPJ (Brazil)	BR (Brazil)	The last two digits of a CNPJ are checkdigits which are calculated based on the given digits. The check numbers are calculated by algorithm (modulus 11): From right to left all digits are multiplied by a decreasing sequence starting with 9. The sum of all products is computed. The total sum is taken modulo 11. The remainder is C13. Repeat the first step taking the C13 also. The sum of all products is computed. The total sum is taken modulo 11. The remainder is C14.	ERROR
Invalid checksum of EU VAT ID BE (Belgium)	BE (Belgium)	This rule checks the checksum of the European VAT number in Belgium. The checksum calculations for the last 2 digits ([C9 C10]) is done using modulo 97: 97 - ( [ C1 C2 C3 C4 C5 C6 C7 C8 ] modulo 97 )	ERROR
Invalid checksum of EU VAT ID DE (Germany)	DE (Germany)	This rule checks the checksum of the European VAT number in Germany. An interactive procedure involving each of the digits C1…C8 in turn used to calculate C9. P = 10 For N = 1…8 (N = character position i.e. C1) S = CN + P M = S modulo 10 If M = 0 then M = 10 P = (2 *M) modulo 11 R = 11 – P If R = 10 then: C9 = 0 else: C9 =R	ERROR
Invalid checksum of EU VAT ID DK (Denmark)	DK (Denmark)	This rule validates the checksum of the European VAT number in Denmark. The calculation is as follows: First a dividend R is calculated by multiplying the different digits (C1 to C8) of the VAT number with the following factors: R = (2*C1 + 7*C2 + 6*C3 + 5*C4 + 4*C5 + 3*C6 + 2*C7 + C8) If R is divisible by 11 then the number is correct according to the checksum check.	ERROR
Invalid checksum of EU VAT ID EE (Estonia)	EE (Estonia)	This rule checks the checksum of the European VAT number in Estonia, which has a format: [C1 C2 C3 C4 C5 C6 C7 C8 C9] where C9 is achecksum digit. The checksum digit is validated usung the algorythm: A1 = 3*C1 + 7*C2 + 1*C3 + 3*C4 + 7*C5 + 1*C6 + 3*C7 + 7*C8 A2 = CEIL(A1 10) C9 = A2 - A1	ERROR
Invalid checksum of EU VAT ID EL (Greece)	GR (Greece)	This rule checks the checksum of the European VAT number in Greece. Check digit (C9) = A2 modulo 10 A2 = A1 modulo 11 A1 = 256*C1 + 128*C2 + 64*C3 + 32*C4 + 16*C5 + 8*C6 + 4*C7 + 2*C8	ERROR
Invalid checksum of EU VAT ID FI (Finland)	FI (Finland)	This rule checks the checksum of the European VAT number in Finland. The last digit is a check digit calculated with Mod 11-2 algorithm. R = 11 - (7*C1 + 9*C2 + 10*C3 + 5*C4 + 8*C5 + 4*C6 + 2*C7) modulo 11 If R = 10 then VAT number is invalid If R = 11: then C8 = 0 else C8 = R	ERROR
Invalid checksum of EU VAT ID FR (France)	FR (France)	This rule checks the checksum of the European VAT number in France which consists of 11 digits in a format: [ C1 C2 C3 C4 C5 C6 C7 C8 C9 C10 C11 ] The check rules are different for old style and for a new style: Case 1: Old Style C1 C2 [C1 C2] = ([C3 C4 C5 C6 C7 C8 C9 C10 C11] [1 2]) modulo 97 Case 2 : New Style C1 C2 S1 = Check Character (C1) S2 = Check Character (C2) If C1 numeric then: C2 alphabetic S = (S1 * 24) + (S2 – 10) If C1 alphabetic then: S = (S1*34) + (S2-100) P = (S/11) + 1 R1 = (S) modulo 11 R2 = ( [C3 C4 C5 C6 C7 C8 C9 C10 C11] + P) modulo 11 R1 = R2 Check Character: 0-0, 1-1, 2-2, 3-3, 4-4, 5-5, 6-6, 7-7, 8-8, 9-9, 10-A, 11-B, 12-C, 13-D, 14-E, 15-F, 16-G, 17-H, 18-J, 19-K, 20-L, 21-M, 22-N, 23-P, 24-Q, 25-R, 26-S, 27-T, 28-U, 29-V, 30-W, 31-X, 32-Y, 33-Z.	ERROR
Invalid checksum of EU VAT ID HR (Croatia)	HR (Croatia)	2) The sum integer is divided by 10, and the rest is kept if that number is 0 it gets replaced by number 10 (this latter number is called subtotal) 3) The obtained subtotal is multiplied by 2 4) The obtained number is divided by 11, and the rest is kept this number mathematically cannot be 0 because the result of the previous step is always an even number 5) The next digit is summed with the rest from the previous step Steps 2, 3, 4 and 5 are repeated until all digits are expanded If the rest of the final step is equal to 1, the check digit is 0. Otherwise, the check digit is a difference between 11 and the rest in the last step. This rule validates the checksum of the European VAT number in Croatia. The checksum is calculated according to this algorithm (international standard ISO 7064 (MOD 11, 10)): 1) The first digit is summed with 10	ERROR
Invalid checksum of EU VAT ID HU (Hungary)	HU (Hungary)	This rule checks the validity of the checkdigit of the European VAT number in Hungary. The VAT identifier consists of 8 digits (C1-C8) whereby C8 is the checkdigit which is calculated based on the values of C1-C7. The calculation is as follows: Calculate the sum A by multiplying each digit C1 to C7 with the following factors: A = 9*C1 + 7*C2 + 3*C3 + 1*C4 + 9*C5 + 7*C6 + 3*C7 If the ones digit of A equals zero then the checkdigit C8 is 0 Otherwise (if the ones digit is 1-9), subtract the ones digit from 10, the result of the subtraction is then the checkdigit C8	ERROR
Invalid checksum of EU VAT ID IE (Ireland)	IE (Ireland)	This rule checks the checksum of the European VAT number in Ireland. Identifier's format is: [C1, C2, C3, C4, C5, C6, C7, C8, C9] where C1 to C7 are number. C8 - checksum letter, C9 is optional and can be a letter in the range [A-I], or “W”. 1. In reverse order, each digit is multiplied by a weight started at 2: C7 - 2 C6 - 3 C5 - 4 C4 - 5 C3 - 6 C2 - 7 C1 - 8 LetterToNumber(C9)- 9 2. LetterToNumber(C9) is based on the following mapping: “A”=1, “B”=2, “C”=3, “D”=4, “E”=5, “F”=6, “G”=7, “H”=8, “I”=9 A “W” or absence of character in position 9 is allocated a numeric value of 0. 3. Sum up the result (sumproduct) 4. The remainder of the modulo 23 indicates the character position on the alphabet according to the following mapping:	ERROR
Invalid checksum of EU VAT ID IT (Italy)	IT (Italy)	This rule checks the checksum of the European VAT number in Italy using the following logic: 1) S1 = C1 + C3 + C5 + C7 + C9 2) S2 = D2 + D4 + D6 + D8 + D10 where: Di = int(Ci/5) + (2*Ci) modulo 10 3) C11 = (10 – (S1+S2)modulo10)modulo 10	ERROR
Invalid checksum of EU VAT ID LU (Luxembourg)	LU (Luxembourg)	This rule checks the checksum of the European VAT number in Luxembourg using the following formula: [C7 C8] = ([C1 C2 C3 C4 C5 C6]) Modulo 89	ERROR
Invalid checksum of EU VAT ID LV (Latvia)	LV (Latvia)	This rule checks the checksum of the European VAT number in Latvia where the last digit [C11] is validated with the following logic: A1 = 9*C1 + 1*C2 + 4*C3 + 8*C4 + 3*C5 + 10*C6 + 2*C7 + 5*C8 + 7*C9 + 6*C10 R = 3 - (A1 modulo 11) If R < -1, then C11 = R + 11 If R > -1, then C11 = R If R = -1, then VAT number is invalid	ERROR
Invalid checksum of EU VAT ID MT (Malta)	MT (Malta)	This rule checks the checksum of the European VAT number in Malta, where the last 2 digits are validated using the following logic: A1 = 3*C1 + 4*C2 + 6*C3 + 7*C4 + 8*C5 + 9*C6 R = 37 - (A1 modulo 37) If R = 00, then C7 C8 = 37 C7 C8 = R	ERROR
Invalid checksum of EU VAT ID NL (The Netherlands)	NL (Netherlands)	This rule checks the checksum of the European VAT number in The Netherlands. The checksum validation is done following modulo 11: A1 = C1*9 + C2*8 + C3*7 + C4*6 + C5*5 + C6*4 + C7*3 + C8*2 A2 = A1 modulo 11 If A2 = 10: then number is invalid else C9 = A2	ERROR
Invalid checksum of EU VAT ID PL (Poland)	PL (Poland)	This rule checks the checksum of the European VAT number in Poland using the following logic: A1 = 6*C1 + 5*C2 + 7*C3 + 2*C4 + 3*C5 + 4*C6 + 5*C7 + 6*C8 + 7*C9 R = A1 modulo 11 If R = 10, then VAT number is invalid. C10 = R	ERROR
Invalid checksum of EU VAT ID PT (Portugal)	PT (Portugal)	This rule checks the checksum of the European VAT number in Portugal following the logic: R = 11 – (9*C1 + 8*C2 + 7*C3 + 6*C4 + 5*C5 + 4*C6 + 3*C7 + 2*C8) modulo 11 If R=10 or R=11, then R = 0 C9 = R	ERROR
Invalid checksum of EU VAT ID RO (Romania)	RO (Romania)	This rule checks the checksum of the European VAT number in Romania. Note that if the length is less than 10 digits, leading zeros must be assumed to perform the computation. Checksum validation logic: A1 = C1*7 + C2*5 + C3*3 + C4*2 + C5*1 + C6*7 + C7*5 + C8*3 + C9*2 A2 = A1 * 10 R1 = A2 modulo 11 If R1 = 10, then R = 0 Else R = R1 C10 = R	ERROR
Invalid checksum of EU VAT ID SE (Sweden)	SE (Sweden)	This rule checks the checksum of the European VAT number in Sweden. The checksum digit is the 10th digit [C10]. The logic is the following: C10 = (10 – (R + C2 + C4 + C6 + C8) modulo 10) modulo 10 Where: R = S1 + S3 + S5 + S7 + S9 Where: Si = INT(Ci/5) + (Ci*2) modulo 10	ERROR
Invalid checksum of EU VAT ID SI (Slovenia)	SI (Slovenia)	This rule checks the checksum of the European VAT number in Slovenia using the following logic: A1 = C1*8 + C2*7 + C3*6 + C4*5 + C5*4 + C6*3 + C7*2 R = 11 - (A1 modulo 11) If R = 10: then C8 = 0 Else if R = 11: then number is invalid else C8 = R	ERROR
Invalid checksum of EU VAT ID SK (Slovakia)	SK (the Slovak Republic)	This rule checks the checksum of the European VAT number in Slovakia using modulo 11: [C1 C2 C3 C4 C5 C6 C7 C8 C9 C10] modulo 11 = 0	ERROR
Invalid checksum of EU VAT ID UK (United Kingdom)	GB (United Kingdom of Great Britain and Northern Ireland)	This rule checks the checksum of the European VAT number in the United Kingdom. For the standard identifier format (9 characters) validation of the 8th and 9th checksum digits follows the logic: R1 = (8*C1 + 7*C2 + 6*C3 + 5*C4 + 4*C5 + 3*C6 + 2*C7 + C8C9) modulo 97 R2 = ((8*C1 + 7*C2 + 6*C3 + 5*C4 + 4*C5 + 3*C6 + 2*C7 + C8C9) + 55) modulo 97 Either R1 or R2 must equal to zero. The following restrictions should be considered: MOD97 (R1): Not in 0100000...0999999 Not in 9490001...9700000 Not in 9990001...9999999 MOD9755 (R2): Not in 0000001...0100000 Not in 0100001...1000000	ERROR
Invalid checksum of FR SIREN (France)	FR (France)	This rule checks the checkdigit of the SIREN in France. The check digit (9th digit of the SIREN, C9) indicates the validity of the SIREN and is validated using modulus 10.	ERROR
Invalid checksum of FR SIRET (France)	FR (France)	This rule checks the checksum of the SIRET in France. For more information on how the checksum is calculated, please have a look in the additional information tab. The check digit is calculated by Modulus 10 or Luhn algorithm.	ERROR
Invalid checksum of Fiscal code (Italy)	IT (Italy)	This rule checks the checkdigit of the Fiscal code (Italy). This checksum rule should be applied only for the identifier which is 16 characters long. In case of 11 digits the same logic as here shoule be applied: https://meta.cdq.ch/Invalid_checksum_of_EU_VAT_ID_IT_(Italy) for checking the checksum. The checksum is done in the following way. Starting from the preceding 15 characters, a check digit is determined as follows: the eight odd characters (1st, 3rd, 5th, etc.) are set apart same thing for the seven even ones (2nd, 4th, 6th, etc.). after that, each single character is converted into a numeric value as show in the tables below: after that, all of the values are to be added up, and the final result has to be divided by 26 the remainder (Modulo) will give the last character, according to the following table:	ERROR
Invalid checksum of GST CA (Canada)	CA (Canada)	b) String all even digits together and multiply by 2 c) Add all digits from the result b. together d) Add the result of a. and c. together e) Subtract the result of d. from the nearest 10 digit. The result of e. must equal the 9th digit. This rule checks the checkdigit of the Goods and Services Tax number (GST) in Canada. The first nine digits of the GST are the Canadian business number. For these 9 digits the checkdigit is calculated, in the following way: a) Add all odd digits, except the 9th one	ERROR
Invalid checksum of INN (Russia)	RU (Russian Federation)	This rule describes the algorithm for checksum digits for INN (Russia). Here there is an algorithm for INN checking – 10 digits: 1. Check sum with the following weighting coefficients is calculated: (2,4,10,3,5,9,4,6,8,0) 2. Check number as a residue of division of check sum by 11 is calculated 3. If check number is more than 9, then check number is calculated as a residue of division of check number by 10 4. Check number is verified with the tenth digit of INN. If they are equal, INN is considered as correct. Here there is an algorithm for INN checking – 12 digits: 1. Check sum according to 11 digits with the following weighting coefficients is calculated: (7,2,4,10,3,5,9,4,6,8,0) 2. Check number is calculated (1) as a residue of division of check sum by 11. 3. If check number (1) is more than 9, then check number (1) is calculated as a residue of division of check number (1) by 10 4. Check sum according to 12 digits with the following weighting coefficients: (3,7,2,4,10,3,5,9,4,6,8,0). 5. Check number (2) as a residue of division of check sum by 11 is calculated 6. If control number (2) is more than 9, then check number (2) is calculated as a residue of division of check number (2) by 10 7. Check number (1) is verified with the eleventh digit of INN and control number (2) is verified with the twelfth digit of INN. In case of their equality INN is considered as correct.	ERROR
Invalid checksum of NIF number (Spain)	ES (Spain)	This rule describes the algorithm for checksum digits for NIF number (Spain) using the following logic: the number (8 digits) is divided by 23 the remainder is replaced by a letter determined by the following table: File:NIF.PNG	ERROR
Invalid checksum of National business register identifier (Austria)	AT (Austria)	This rule checks the checksum of the National business register identifier (Austria) following the logic: 1) apply the weight number to each identifier's number 2) calculate a sumproduct of the identifier's number and respectful weight digit 3) sum up the result 4) apply modulo 17 the summed up result 5) lookup the rest number of the modulo 17 in a reference table ---> checksum letter. Any difference result in a rule violation.	ERROR
Invalid checksum of Numero de Identificacion de Extranjero (Spain)	ES (Spain)	This rule describes the algorithm for checksum digits for Numero de Identificacion de Extranjero (Spain) using the following logic: To calculate the check digit, each letter is replaced by a number: - replace the first letter accordingly: X → 0 Y → 1 Z → 2 - the number (8 digits) is divided by 23 - the remainder is replaced by a letter determined by the following table:	ERROR
Invalid checksum of Polish Tax Identifier	PL (Poland)	This rule describes the algorithm for checksum digit (the last 11th digit) for Polish Tax Identifier using the following logic: 1) 9×a + 7×b + 3×c + 1×d + 9×e + 7×f + 3×g + 1×h + 9×i + 7×j 2) apply modulo 10 to the sum from step 1 3) the rest of the modulo 10 is a check-sum digit.	ERROR