I sold a shirt on eBay 6 weeks ago. By mistake I printed out a different label twice, and the shirt got shipped to the other buyer. I contacted her and asked her to refuse it and do return to sender. She responded that she did it, and it's on the way back.
Some time passed, and I never received it. I assumed it either got lost in the mail, or she kept it and lied about returning it. I contacted the buyer of the shirt, told him it probably got lost, and refunded the money.
Today, i came home, and lo and behold, the package was at my door. The Return To Sender label had a date of 7/1. It seems like it got lost in the USPS system for 5 weeks, and they just found it this week. I contacted the original buyer to ask him if he still wants it, and he said yes.
I guess all's well that end well.