Several years ago another poster here and I tried to work out a swap of Lefever guns. We shipped the guns back and forth on approval. The trade didn't work out. The other gentleman insisted I return his gun USPS registered mail, which of course I did. My gun came back just fine but his went missing.
Registered mail has to be signed for at each postal facility it goes through. The postal clerk signing for it is responsible until the next clerk signs for receipt.
Finally, the other guy began to get suspicious of me I think and became persistent with inquiries to me. I initiated a postal investigation through my local post office.
Turns out the gun had arrived in Ohio at the other guy's city and was signed for by a clerk on the way out the door on vacation. Having become responsible for it, she had locked the package away somewhere for safe keeping until her return to work.
The gun was delivered after her return in good shape. That was the slowest 'snail mail' delivery I have ever heard of...Geo