Business::CreditCard These subroutines tell you whether a credit card number is self-consistent -- whether the last digit of the number is a valid checksum for the preceding digits. If you additionally want to process the credit card electronically, see Business::OnlinePayment <http://perl.business/onlinepayment> Original author is Jon Orwant <orwant@tpj.com>, The Perl Journal and MIT Media Lab Current maintainer is Ivan Kohler <ivan-business-creditcard@420.am>. Please don't bother Jon with emails about this module. Lee Lawrence <LeeL@aspin.co.uk>, Neale Banks <neale@lowendale.com.au> and Max Becker <Max.Becker@firstgate.com> contributed support for additional card types. Lee also contributed a working test.pl.