Anything can get "seized" if there is "reasonable suspicion". Which, as I learned this past Week. Can come from ANYONE with a decent Hand.
A guy, who's Son-in-Law is a "Niagara County Sheriff" recently started intercepting and 'seizing' Parcels addressed to me or my Cousin.
We had to file multiple disputes, talk to Consumer Affairs, Litigation Department etc...
Eventually, we broke through as the Post Office simply didn't want to deal with BiWeekly "sweeps" from Consumer Affairs and Investigative Units for Consumer Litigation.
IF you ever have an Issue with the Post Office; due to Seizures or otherwise, calling the 800-number is ALMOST ALWAYS to no Avail.
You NEED to Reach the Local Office/s.
...But when you call the USPS Main Number 1-(800) 275-8777
You should follow the Paths, choose Option 4, 4 and then say "THEFT" at the Last Prompt.
This will IMMEDIATELY transfer you to a Customer Service Representative...and when Italian & Russian (VIP) Business-Men need to get through, of course, they usually have enough CONTACTS to not have to call that Number...but when they DON'T - that's the Strategy they Use.