![]() The are required by payment systems such as MasterCard and Visa to authenticate their credit or debit cards. "CVV2" or "Card Verification Value 2" -Visa."CVE" or "Elo Verification Code" - Elo - Brazil."CVN2" or "Card Validation Number 2" - China UnionPay."CSC" or "Card Security Code" - Debit Card. ![]()
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