The time for Amazon to automatically refund varies depending on the refund method and whether the seller performs the refund operation within the specified time. When the buyer uses a credit card to pay online, if the seller agrees to a refund within the specified time, the refund will arrive in the buyer's credit card account within 3 to 5 working days. If the buyer uses an Amazon gift card to pay online, the refund will arrive immediately in the buyer's Amazon gift card account after the seller agrees to the refund. If the buyer chooses to pay on delivery, the refund will be returned to the buyer by transfer or check within 3 to 5 working days after the seller agrees to the refund. If the buyer uses Amazon Payment to pay, the refund will arrive in the buyer's bank account within 1 to 2 working days after the seller agrees to the refund. In general, Amazon's automatic refund can be completed in a relatively short time under certain conditions, but the specific time needs to be determined according to the specific situation.