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what is the verification code on a credit card
Credit Card verification codes are important safety features designed to protect your credit card accounts.
how does the credit card verification code protect credit card accounts
When the credit card company processes the charge, they check the code to see if it is correct. This validates that the customer had the card in their possession
where is the credit card verification code located
The Credit Card Verification Code is the three digits located on the back of your credit card, in the signature strip.

Question: what if the code becomes illegible
Self-contained rewrite: what if the credit card verification code becomes illegible