CSC Response Codes

Card security code (CSC) is a security feature that protects against fraud. It ensures that credit card transactions can't be made without it being in the cardholder's possession.

CSC Response Codes

Response Code Message
M The CSC matches the issuing bank’s records
N The CSC does not match the issuing bank’s records
P The CSC was not processed
S The card should have a CSC, but merchant indicated it was not present
U Card issuing bank does not participate
X Unknown / No response