Ensure the CSC (3 or 4 digit code on the front of the card) is correct.
If the CSC code is correct, check your CSC settings. The following are the setting options:
None: All CSC codes are accepted
Light: Y and X CSC codes are accepted
Full: Y CSC codes are accepted
Y: CSC matches the code on the record
N: CSC does not match the code on the record
X: CSC was not checked
Refer to What are the Card Security Code (CSC) settings in the merchant account settings? (BB294752) for additional information regarding CSC.
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