The “security code” is usually the CVV/CVC—a short number printed on the card that helps verify online purchases. On most cards it is on the back, near the signature strip. This page shows where to find it and what to do if you can’t.
Where to find the security code
Common problems (and quick fixes)
1) The security code is scratched off or unreadable
If the digits are damaged, you may not be able to use the card for online purchases. Some issuers can help if the card is registered or if you have proof of purchase. If you can’t read the code, contact the issuer using official details from your card packaging or documentation.
2) The website keeps rejecting the security code
- Double-check you are entering the correct digits (3-digit vs 4-digit).
- Try typing the number manually (avoid autofill mistakes).
- Make sure the card has enough balance for the total, including tax/shipping.
- Some merchants do not accept certain prepaid/gift cards for online purchases or for subscriptions.
- If the payment form asks for a billing ZIP/postal code, use the one tied to the card (if your card supports registration).
If you’re getting online declines, read Using Your Card Online for the most common reasons and step-by-step troubleshooting.
3) A site asks for a “PIN” instead of a security code
A PIN is different from CVV/CVC. PINs are often used for in-store debit transactions or ATM access (depending on the program). If a site specifically asks for CVV/CVC and you enter a PIN, it will fail.
What not to do
- Don’t share your security code with anyone who contacted you first.
- Don’t provide OTP codes to “support” or “verification” messages.
- Don’t install remote-access apps to “fix” a payment.
- Don’t post screenshots of the card (even with some digits blurred).
Next steps if your online payment still fails
Use Troubleshooting for quick checks, then review Using Your Card Online (ZIP/billing address issues, common declines) and Fees & Limits (holds that reduce available balance).