checksum for credit cards?

This WebDNA talk-list message is from

1997


It keeps the original formatting.
numero = 12781
interpreted = N
texte = Quick question---is a checksum performed if I'm using card=VISA+MC instead of PayMethod=cc (as below)? And should I care if I'll be using WebMerchant and MacAuthorize? TIA,Card: TIA,Dale Stokdyk dstokdyk@dvs.mv.com Associated Messages, from the most recent to the oldest:

    
Quick question---is a checksum performed if I'm using card=VISA+MC instead of PayMethod=cc (as below)? And should I care if I'll be using WebMerchant and MacAuthorize? TIA,Card: TIA,Dale Stokdyk dstokdyk@dvs.mv.com Dale Stokdyk

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