# stdnum.si.ddv

ID za DDV (Davčna številka, Slovenian VAT number).

The DDV number (Davčna številka) is used for VAT (DDV, Davek na dodano vrednost) purposes and consist of 8 digits of which the last is a check digit.

    >>> validate('SI 5022 3054')
    '50223054'
    >>> validate('SI 50223055')  # invalid check digits
    Traceback (most recent call last):
        ...
    InvalidChecksum: ...

stdnum.si.ddv.calc_check_digit(number)

  Calculate the check digit. The number passed should not have the check digit included.

stdnum.si.ddv.compact(number)

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

stdnum.si.ddv.is_valid(number)

  Check if the number is a valid VAT number.

stdnum.si.ddv.validate(number)

  Check if the number is a valid VAT number. This checks the length, formatting and check digit.