Reason Code A01 – Charge Amount Exceeds Authorization Amount

Your chargeback response must include at least one of the following items:

• If you processed the transaction correctly, provide an authorization approval for the full amount or proof that the purchase was an exception to the rule.
• If you have already processed a refund for the transaction in question, provide documentation that proves you have credited the cardholder’s account.

• Don’t change the amount of a transaction once authorization has been requested and approved.
• If you add gratuities to transactions, don’t exceed the acceptable limit.