The most common issue I have with USPS is not completing origin scans but I found this is more common if you use the blue boxes than if you drop off directly at the PO in the parcel drop drawer. Not sure why that’s such a problem, but from the buyer’s end, it will look like you dropped off late because there’s no origin scan and there will be no updates on the tracking until it reaches the next destination point.
There’s really not much you can do on your end - they have the worst phone system - their online systems are often plagued with errors when you try to file claims and they’ve changed the design of the blue boxes to now only be barely the width of a letter to prevent you from dropping small parcels (e.g. bubble mailers) in them. In some ways, the last change was a blessing because since then we’ve had no issues (knock on wood) with missed origin scans.
TLDR: as long as you’re dropping off within your committed time window, this is really a non-issue, as long as orders are making it to customers at the end. The rest is on the post office.
