API and SDKs
Legal Registration Number

Provide official legal registration numbers, formatted according to each country’s rules, to meet Klarna’s onboarding standards.

The legal_registration_number efines the official registration identifier assigned by a government authority. The format and validation vary by jurisdiction.

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  • Always use the official company registry identifier.
  • The format differs per country and may include letters, digits, or delimiters.
  • Some countries (e.g., Germany) require contextual details to ensure uniqueness.

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In Germany, the legal_registration_number alone isn’t sufficient for unique identification. Both fields must be provided:

  • legal_registration_number: e.g., HRB 12345
  • legal_registration_authority: e.g., Amtsgericht München

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Refer to the country-specific registration formats below for validation patterns and examples. (Regex condensed for readability.)

CountryOfficial name (common)RegexExample(s)Notes
ATFirmenbuchnummer (excl. VAT)^(?!ATU\d{8})(?!K6\d{5}$).{5,11}$FN 123456aExplicitly excludes VAT ATU and social K6 IDs.
AUACN/ABN^\d{9}d{11}$123456789, 12345678901
AXOrg. ID^[A-Z]{2}\d{7}-\d$AX1234567-1Prefix + 7 digits + check.
BEBCE/KBO^[01](\.?\d){9}$0123.456.789Dots optional.
BGЕИК^\d{9}$1234567899 digits.
BYUNP^\d{9}$1234567899 digits.
CABusiness/provincial no.(^\d{2}-\d{7}$)(^\d{3}-\d{2}-\d{4}$)(^\d{9}$)(^\d{6}-\d{1}$)(^\d{10}$)12-3456789, 123-45-6789, 123456789Multiple provincial formats.
CHUID^[A-Z]{3}-\d{3}\.\d{3}\.\d{3}$CHE-123.456.789Fixed prefix.
CYReg. No.^[A-Za-zΑ-Ω]{2} \d{6}$HE 123456Two letters + space + 6 digits.
CZIČO^\d{8}$256660018 digits.
DEHandelsregister (HRB/HRA etc.)^([g,G][n,N][r,R](PV)RHR(AB))( \d{3,6})( \w{1,2})?$^HRB \d{2}$HRB 123456Handelsregister number (e.g., HRB 12345). Must be combined with legal_registration_authority (e.g., “Amtsgericht Frankfurt am Main”), since numbers are only unique within a local court’s jurisdiction.
DKCVR^\d{8}$123456788 digits.
EERegistrikood^\d{8}$102938478 digits.
ESCIF/NIF(^[A-Za-z]\d{7,8}$)(^[A-Za-z]\d{6,7}[A-Za-z]$)(^\d{7,8}[A-Za-z]$)(^TF-\d{5}$)B12345678, 12345678Z, TF-12345Historic variants supported.
FIY-tunnus^\d{7}-\d{1}$1234567-8Hyphen required.
FRSIREN/SIRET^(\d{3} ?\d{3} ?\d{3})( ?\d{5})?$552100554, 552 100 554 00013Spaces optional.
GARCCM^\d{9}$1234567899 digits.
GBCompanies House No.^([0-9]{8}[A-Za-z][0-9]{7}[A-Za-z]{2}[0-9]{6})$012345678 digits.
GGCompany No.^[A-Z]{3}\d{5}$GGG123453 letters + 5 digits.
GICompany No.^\d{5}$123455 digits.
GRGEMI^\d{12}$12345678901212 digits.
HKCR No.^\d{7,8}$123456787–8 digits.
HRMBS^\d{11}$0812345678911 digits.
HUCg. no.^\d{2}-\d{2}-\d{6}$01-09-123456Standard format.
IDNIB^\d{12}$12345678901212 digits.
IECRO No.^([A-Za-z]{2})?[0-9]{6}$123456, IE123456Optional prefix.
ILCompany No.^\d{9}$5101234569 digits.
IMCompany No.^\d{6}[A-Z]$123456C6 digits + letter.
ISKennitala (org)^\d{10}$501234123010 digits.
ITCodice fiscale / P.IVA^(\d{11}[A-Z0-9]{16})$12345678901, ABCDEFGH1234567
JECompany No.^\d{6}$1234566 digits.
JPHoujin Bangou^\d{13}$123456789012313 digits.
LIUID^[A-Z]{2}-\d{4}\.\d{3}\.\d{3}-\d$LI-1234.567.890-1Includes prefix + check.
LTLegal Entity Code^\d{9}$1234567899 digits.
LURCS^[A-Z]\d{6}$B123456Letter + 6 digits.
LVReģ. Nr.^\d{11}$4000301234511 digits.
MTROC No.^[A-Z]\d{5}$C12345Single-letter + 5 digits.
MXRFC (moral persons)^[A-Za-z]{3,4}\d{6}[A-Za-z0-9]{3}$ABC010203XYZLetters + date + suffix.
NLKvK-nummer^\d{8}$302812678 digits.
NOOrganisasjonsnummer^\d{9}$9846611859 digits.
NZNZBN^\d{13}$942903123456713 digits.
PARegistro^\d{9}$1234567899 digits.
PLREGON (company)^\d{10}$123456785010 digits.
PTRNPC^\d{9}$5001234569 digits.
ROONRC^([A-Z]\d{2}/\d{3,5}/\d{4})(^[JFC]\d{4}\d{6}\d{2}\d{1})$J40/12345/2020
SEOrganisationsnummer^\d{6}-\d{4,5}$556016-0680Dash required.
SGUEN (simplified)^\d{9}[A-Z]$123456789ANumeric + suffix only.
SICompany ID^\d{10}$123456789010 digits.
SKIČO^\d{2}\s\d{3}\s\d{3}$12 345 678Spaces required.
SMCompany No.^[A-Z]{2}\d{5}$SM123452 letters + 5 digits.
TRTicaret Sicil No.^(?:\d{5}-\d{5}\d{6}-\d)$12345-67890, 123456-7
USState File No.(^\d{2}-\d{7}$)(^\d{3}-\d{2}-\d{4}$)12-3456789, 123-45-6789State-specific variations.