stdnum.fi.alv

ALV nro (Arvonlisäveronumero, Finnish VAT number).

The number is an 8-digit code with a weighted checksum.

>>> compact('FI- 2077474-0')
'20774740'
>>> is_valid('FI 20774740')
True
>>> is_valid('FI 20774741')  # invalid check digit
False

stdnum.fi.alv.checksum(number)

Calculate the checksum.

stdnum.fi.alv.compact(number)

Convert the number to the minimal representation. This strips the number of any valid separators and removes surrounding whitespace.

stdnum.fi.alv.is_valid(number)

Checks to see if the number provided is a valid VAT number. This checks the length, formatting and check digit.