The decision to reject your credit card payment is typically made by your card issuing bank (not by BASO ). To protect your security and privacy, your bank cannot provide BASSO detailed reasons for why your payment was declined.  Because of this, you will need to contact your bank directly to solve most credit card related payment issues. Top 7 reasons why credit card payments are rejected: 1.The transaction was blocked by the payment server because it didn’t pass all the risk checks Insufficient Funds Referred Incorrect CSC code entered (i.e., typically a 3 digit code located in the back of your card) Expired card Fraud suspicion Declined by bank (no specific reason provided)