That's really weird. Maybe she used a third party drop off site that takes in USPS shipments? Not to sound too optimistic, but I have a drop off location that ships UPS/FedEx/USPS at my work and I've used it to drop off packages for my Poshmark and Tradesy transactions. The scan when it gets picked up doesn't appear until later in the evening.
Unfortunately, one of my Tradesy packages didn't get scanned and shipped until 2 days later. I think what happened was that my package was either picked up by the wrong courier/truck or it somehow got misplaced and was never picked up on the day it was supposed to. Luckily my buyer was super nice about it, but I was seriously sh*tting bricks. I did give my customer the tracking number, though; I'm not sure why your seller doesn't know where the tracking number is because it should say so in her account like you said.
Crossing my fingers for you...![]()
Oops, sorry same as this post. I always check at the end of the next shipping day to make sure it was scanned and most of the time it is not uploaded to Tradesy's site until I personally contact Tradesy and then they update it.