+25 What Is The Security Code On A Card References. Retailers usually ask you to. When you provide your security code to a retailer, along with your credit card number and card expiration date, the information is instantly sent to the card issuer for authentication.
Because you're not physically presenting the card, this proves that you have a physical card and can help protect against identity theft. Web a card security code (csc; Where to find the cvv security code
