Incorrect VAT validation for Poland when total sum modulo with 11 is 10
banafsheh-unify opened this issue · comments
It seems there is an issue with VAT validation for Poland.
According to this wikipedia page (https://pl.wikipedia.org/wiki/Numer_identyfikacji_podatkowej) and the spec here (https://romek.info/ut/nip-rego.html#nip) the following numbers are invalid VAT numbers:
- 0000000000
- 1234567890
The above links are in Polish, I used google translate to make sense out of the parts where it states that the modulo of the calculated sum cannot be equal to 10, otherwise that VAT is invalid.
At least one issue occurs when checksum mod 11 is 10, according to the spec this should indicate an invalid VAT number. An english version of the specs can be found here https://ec.europa.eu/taxation_customs/tin/#/check-tin (download file under "Get the TIN specifications", page 42).
This is the case with VAT number 1234567890.