I bought an OP-1 from teenage engineering years ago and fedex delivered it inside of the mailbox. USPS removed the fedex package from the mailbox and impounded it at our local USPS post office without ever notifying me. After 1-2 months of waiting/assuming the package had been stolen, I call the USPS office and asked if they somehow had the package in their custody/possession and, lo-and-behold, they did (in the "undeliverable mail room") and started lecturing me about how it was illegal for fedex to deliver a package into the mailbox, which is usps/government property etc. etc.

I called Fedex to try to rectify this and, as far as I remember, they either never answered the phone or told me they had no way of contacting the delivery driver (??).

I've always avoided fedex (and UPS, for that matter, since they destroyed two antique lamps that I ordered through ebay) since then.