As usual, Mercari’s response is absolutely ridiculous. Tracking clearly shows it was dropped off at UPS. Not like you could fake that. Only thing I can think of is typical for Mercari… it’s an automatic response from a bot based on key words/phrases. It flags your message saying the package is held by USPS for not having proper postage and automatically gives the response about it being dropped off incorrectly with USPS. It’s a bot so it’s not looking at the actual tracking. All you can do is keep trying to message them and, hopefully, get a real person that will actually look at tracking. If not, I’d recommend filing a complaint with BBB. I know a lot of people say they’re useless. But it’s worked for me and others have posted/commented it did for them too. It obviously won’t always work. But, IMHO, it’s the best way to know you’re actually going to get a human to respond that can read what’s happening and look at all the info, like tracking, and give a real response instead of a BS copy/paste response based on key words/phrases without looking at everything else along with it. This is only supposed to happen when it’s dropped off at the wrong carrier (USPS instead of UPS or FedEx). But, I’ve seen a few posts from sellers saying they dropped it off correctly (tracking shows it too) and Mercari saying it was incorrectly dropped off at USPS. Aside from Mercari just being Mercari and trying to pull shady BS, I don’t understand why this happens in the first place - why USPS says it doesn’t have proper postage. I could at least think of a possible explanation when it’s a FedEx label, because FedEx no longer has a contract with USPS to handle the last leg of delivery. That ended a while back when the contact with UPS also ended. But UPS negotiated a new contract with USPS. As far as I know, FedEx hasn’t and is supposed to be handling the package the entire way. But, even that I don’t really understand since FedEx is the one handing it off to USPS. If they no longer have a contact with them, why TF do they hand it off? And why do the labels still have USPS tracking on them? Makes no sense. But, with UPS, it makes even less sense since they actually renewed their contact with USPS. So it makes no sense why USPS would say it doesn’t have proper postage when it was properly dropped off with UPS and UPS was the one to hand it off to USPS - exactly how it’s supposed to work. 🤦‍♀️ More on reddit.com

Move with as absolutely little as you possibly can. Ideally, fit everything in a sedan or SUV. Using a moving truck for that distance would be so expensive that there's not much that would make sense to bring with you. Once you're moved in, use marketplace or other places to get cheap/free furniture. You can get an air mattress for like $50 to sleep on until you can find a good deal on a real bed. More on reddit.com

I'm sorry I don't know the answer to your question, but I would imagine RM would be obliged to refund the fees as well - it's taking a about 2 weeks to recieve a refund at the moment. Please let me know the result? More on reddit.com

If the adjustments were in error you can very easily dispute them through an online form at the USPS website that takes less than a minute to fill out. There are instructions in the email from eBay. If USPS approves the dispute then the funds are credited back to your original form of payment (typically eBay funds). If the adjustments were legit because you entered bad data when buying the label, then you'll have the same issues no matter where you buy the labels. This isn't an eBay problem. The adjustments come from USPS. More on reddit.com