Algorithm::CheckDigits::M89_001 - compute check digits for VAT Registration Number (LU)

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ALGORITHM 1 The checksum is the whole number taken modulo 89. METHODS is_valid($number) Returns true only if $number consists solely of numbers and the last digit is a valid check digit according to the algorithm given above. Returns false otherwise,...

Algorithm::CheckDigits - Perl extension to generate and test check digits

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