Aaron...you takin' notes? ;) Jeff Daniel Convissor wrote: > On Wed, Mar 31, 2004 at 12:27:29PM -0500, Joel De Gan wrote: > >>Oh a side note, you should have added the Luhn check digit algorithm > > > I've got a class that does that: > http://www.analysisandsolutions.com/software/ccvs/ccvs.htm > > --Dan >