You cannot return parts to O'Reilly without a receipt.
O'Reilly Auto Parts will only accept returns on parts that is accompanied with the original sales receipt.
You can also view and print out account invoices from the O'Reilly website.
O'Reilly Auto Parts has limited warranties on some products, such as batteries, air conditioning systems, fuel pumps, and remanufactured engines. To be eligible for warranty service, you must return the product with the original sales receipt to any O'Reilly Auto Parts location.
You are able to view and print your account invoices from their web site www.oreillyauto.com as well as access valuable information.