To start a return process by mail, access Gap’s interactive return process. Pack the item you are returning securely in its original packaging, along with the completed invoice and affix the shipping label to the package. Once ready, you can drop the package off at a UPS location, give it to your USPS mail deliverer, or drop it off at the post office. You can also return a Gap purchase to a Gap store. Just find a store near you and bring the item you are returning along with the shipping confirmation.