Request declined
CVV shops sell stolen card numbers. Buying, selling, or using those numbers is payment card fraud under 18 U.S.C. ยง 1029 in the United States and comparable laws elsewhere. I can't write a buying guide for that.
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What I can write instead
- How card-not-present fraud is detected by issuers and processors.
- How merchants reduce chargebacks from stolen-card purchases.
- What the legal penalties are for trafficking in card data.
- How to report a stolen card or a fraud listing to the FTC, IC3, or your issuer.
If you want one of those, say which and I will write it.