Hate to break it to you, but this sounds like a logistical nightmare. First off, tons of postal services don't allow you to mail money (and if you did, it would not be insured). There's the issue of the mailman stealing the money, or someone on your receiving end stealing the money, or lost packages, etc etc.
Also, people would have to trust you. And the postal system. And your workers. And their luck...
USDT is just a lot easier, and it's more legal and established too.
Ok well they can send us USDT if they feel uncomfortable with the process, I've sent money to people many times through the mail it's not a problem, it's not illegal either and the post office would should obviously never know that that is what you're sending. My only concern was all of it coming to our address of where ever we ask people to send the bills to. But I'll carry on my point.
They send us USDT, for a really small fee we could just go to the bank and buy real USD with that USDT (long process but there's a way), then we just send them an email saying, you know, here's your infomation if you want it, these are the bills we bought with your money, this is what can be sent back to you if you so choose.
and then we just reverse that process, turning the USD back into USDT and sending it to them, or sending it by mail.
Thank you for the reply I really didn't think I was going to get any, haha, these are the things I want to think about though, let me know if you like my solution, i'm sure there are many.