The cardholder has the responsibility for following up with the vendor or bank (JPMorgan Chase) on any erroneous charges, disputed items or returns, as soon as possible. Disputed billings can result from failure to receive the goods charged, defective merchandise, incorrect amounts, duplicate charges, credit not processed, as well as fraud and misuse.

Credits: To request a credit to be applied to the purchasing card account from the vendor, refer to the cardholder receipt. If the item was shipped, refer to the packing slip.

Returns: The vendor should issue credit for any item that has been approved for return. The credit should appear on a subsequent statement. Any item returned, that was purchased with the purchasing card must be returned for credit. Do not accept a refund in cash or check.

Disputed Items: If the cardholder has a problem with a purchased item or a billing resulting from the use of the purchasing card, the cardholder should first try to reach a resolution with the vendor that provided the item. In most cases, disputes can be resolved directly between the cardholder and the vendor.
If you have a disputed charge and cannot reach resolution with the vendor, contact JPMorgan Chase Cardholder Support Team at 1-800-270-7760.
Disputed items must be resolved or reported within 60 days of the date that JPMorgan sent the first statement or transaction file.

Make sure you keep documentation of credits, returns, exchanges and disputed items.