Delivery Confirmation and Signature required? Were they insured? Only way I’d ship anything of any value USPS, because if any of those are not done, good luck getting USPS to do dick. Have been fucked a few times like this.
Plus anything shipped of value the last thing I’d choose is USPS anyways. Their tracking is piss poor and ends up being just about as expsepenive as using UPS anyways with all those options