A part that I ordered from Nissan Parts Plus on 31 December 2019 (shipped by them on 7 January 2020) proved to be the wrong part so, after contacting them and getting approval to return it, I FedEx'd it to them on 16 January. It was delivered to them by FedEx and signed for on 23 January. On 9 February I sent an email to their customer service address (with a copy of the FedEx proof of delivery attached) asking for an update on the refund status. I did not receive a reply to that email so I telephoned their customer service number on 14 February and spoke to Dave, who politely said that he had no information but would ask a supervisor. I offered to give him the credit card number that the order was charged to in case they lost it but he said they had it. As of 21 February, I still have not received the promised refund and I am now going to dispute the charge with my credit card company. PDFs of the order, proof of delivery, and email correspondence are available on request.