I’m glad this has worked out for you, and I wish you nothing but the best, but my experience doing that was an unmitigated and costly disaster, and I would highly recommend against it, based on what we had happen.
Some years ago (can’t recall exactly when), someone on the OSFE suggested putting “Return Service Requested” on outgoing BPM parcels, so I did. I’m old enough to remember, many years ago, seeing this verbiage on a lot of mail, even on letter mail, especially from businesses, so I knew what it meant.
We soon began receiving a large number of BPM parcels returned to us, with scans showing they never left the state or sometimes even the post office where they were mailed. We figured out why when postal clerks at the counter (in those days we dropped off some of our parcels at the counter; now we take ALL of them to the counter so they get scanned) started saying to us, politely enough and obviously bewildered, “Oh, this is a return? You’re returning this? You want this returned to sender??” No clerk to whom we explained our intent had the first clue what “Return Service Requested” meant. And not only young clerks, either – people who were multi-decade postal workers. At the time, we happened to be making a lot of out-of-town trips either to scout books or visit family many counties away, so sometimes would mail books at post offices other than our usual one here at home. And we encountered this complete bewilderment at a number of post offices in Northern and Southern California.
It was a huge problem for a little while, with parcels being delivered late and sometimes having to pay twice for postage to send the book out again. So we stopped the practice and, until last year, never had a problem getting BPM returned if undeliverable. Again, we have always understood the risk and fully accept it. It’s a pain to completely lose merchandise once in a while, but the lower cost is worth the risk.
BTW, we feel incredibly fortunate in general to get such fast delivery times on MM and BPM; I know that is not the case for all booksellers, depending on multiple factors. But most of our books and media are delivered within 2 to 3 days (a bit longer if there’s a Sunday or holiday in between) anywhere in the lower 48. For some reason, anything we send to any Washington, D.C., address is delivered in exactly 2 business days, like clockwork, without exception, regardless of mail class. It’s kinda weird. (Not the same for Maryland or Virginia, even on the outskirts of D.C.) My only guesses are maybe there are more flights to D.C. out of Sacramento because it’s the state capital, or maybe D.C. mail just gets some expedited treatment that I’m not aware of.