Compare the transaction on your receipt to the one that appears on your checking account statement. If you did not make the purchase and the transaction is fraudulent, contact your bank immediately, file a report and request that your card be canceled and a new card issued. If you did make the purchase, however, proceed to Step 2.
If the amount on your receipt differs from the amount on your statement, contact the merchant where you made the purchase and attempt to resolve the problem. Request a credit to your account if appropriate. If you are unable to resolve the issue with the merchant, proceed to Step 3.
Contact your bank and explain the situation. Let a bank representative know that you have spoken with the merchant and ask the bank to investigate the charge.
Send your bank a copy of the receipt along with your statement and a letter of explanation. State what you believe the correct amount should have been and request a credit for the difference.
When you receive your next statement, verify that the bank has issued a credit to your account. If no credit appears, contact the bank immediately and ask for an explanation. Continue this process in subsequent months until the issue is resolved.