"I also use USPS Priority Mail...
Postal Service personnel may not open mail sealed against inspection except under the circumstances described in ASM 274 (google).
By those USPS Regulations, US Postal Clerks are required to ask only a few specific questions about the mailability of a parcel's contents, "
I believe you have to use "registered" priority mail in order to get the signoffs etc. Costs more but worth it for high value items.
"Registered mail is the Postal Service's most secure form of mail delivery, involving an unbroken chain of custody. Registered mail is protected in sealed containers, safes and cages, and held under lock and key. This extra level of security can cause delays and may require up to 14 days for delivery. Choose registered mail when the contents of the mail require additional security and time is not a factor."
Last edited by cpa; 11/02/17 04:55 PM.