Not Fedex but the USPS. Ordered a small part for my snow blower through Amazon in December. It was shipped on 12/22/2020. Tracking showed it went as far as St. Louis, MO then nothing for weeks. Received a a refund from the vendor through Amazon. I bought another part from a different vendor which arrived promptly. I checked the tracking on the original order a few times after receiving my refund but no updates. It disappeared in St. Louis. On March 2nd the part I first ordered appeared in my mailbox. I contacted Amazon and they said just keep it.
