The latest buyers can file a claim is 90 days from the maximum estimated delivery date. That said, it is possible for buyers to submit claims after these timeframes if Amazon finds that an investigation into the matter is warranted, including cases where an incorrect item has been sent.
If a claim has not yet been granted, you can resolve it immediately by issuing a full refund to the buyer. In some cases, Amazon initiates buyer reimbursement upon receipt of the claim. It's still important for the you to either respond to us and tell your side of the story or to appeal, if you disagree with the decision. Amazon reserves the right to recover reimbursed claim funds from you.
If a claim has not yet been granted, you can resolve it immediately by issuing a full refund to the buyer. Otherwise, the seller should respond to Amazon immediately to represent their side of the claim.