I have talked to Buccopride by private message. I just texted WiseandEck a proof picture that I took of his stuff going out. He just confirmed he got his stuff.
I held it out because I had a team set that also needed to go with his stuff. Unfortunately I did not take a proof picture of Buccopride's stuff but it was placed in my mailbox with the flag up just like everyone else's stuff, which to my knowledge got back to its owners successfully.
I can confirm that I got his stuff back, put it back in the SASE, and put it in my mailbox. Beyond that, I have no control of what the post office does. I want to make this right but I feel like this is a postal issue rather than my liability. It's an SASE from my mailbox so there's no tracking.
Anyone else ever have anything like this happen or have a successful claim with the post office?