I had the post office deliver my trade-ins to the wrong address where they were lost.
I called Lightspeed with credit card in hand, ready to pay the extra $250 and fight it out with the post office. The lady there said to just email the receipt that showed it shipped and they would consider it delivered. Above and beyond anything I expected.
As an aside, I had the headsets insured for $250. Made a claim with the post office, and they sent me a check for about $36. Barely more than my postage and insurance. I appealed and was turned down. I could appeal one final time within 30 days, but I was so disgusted I let the 30 days run out, which is probably the results that the system is set up produce.
I simply no longer use the post office for anything worth more than about $30.