For Visa, MasterCard, and Discover debit or credit cards, the CSC is the 3-digit number located on the back of the card, usually printed to the right of the signature strip.
How do I find out my debit card security code?
Your debit or credit card security code can be found on the signature strip on the back of your debit card. It is a 3 digit number. It will either be the only 3 digits on the signature strip, or will be the last 3 digits on the right if there are more digits on the strip.
Where is the 4 digit security code on a debit card?
Look for the 4-digit code printed on the front of your card just above and to the right of your main credit card number. This 4-digit code is your Card Security Code.