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. § 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.