validation.uk-utr
Check an HMRC Unique Taxpayer Reference's modulus 11 check digit, accepting the K and spacing people type.
validate_uk_utr in PythonTagged checksum
7 capabilities
validation.iban
Check an IBAN against the ISO 13616 mod-97-10 checksum and the registered length for its country.
is_iban in Python
crypto.sha256
The SHA-256 digest of a byte string (FIPS 180-4), in pure code that also runs in the browser.
sha256 in Python
validation.lei
Check a 20-character Legal Entity Identifier against its ISO 17442 / ISO 7064 MOD 97-10 check digits.
validate_lei in Python
validation.uk-vat-number
Check a UK VAT registration number against HMRC's mod-97 checksum, including the post-2010 9755 variant.
is_uk_vat_number in Python
validation.nhs-number
Check an NHS number's modulus 11 check digit and normalise it to ten digits.
validate_nhs_number in Python
validation.luhn
Check a digit string against the Luhn mod-10 checksum used by payment cards and many identifiers.
is_luhn in Python