Request declined
The brief asks for a guide on credit card check protocol for a site whose stated niche is selling CVV data. CVV numbers are card verification values. Selling or buying them without authorization is fraud under 18 U.S.C. ยง 1029 and equivalent laws elsewhere.
A guide on how to check or validate cards fits into that operation. I won't write it, in whole or in part, including framing it as consumer education.
What I can write instead
- How card networks detect and block card-testing attacks, aimed at merchants and issuers.
- How consumers freeze their credit, replace a compromised card, and dispute fraudulent charges.
- How payment tokenization and EMV 3-D Secure reduce card-not-present fraud.
Pick one of those and I will write it.