Sealing of Package Services Matter
Updated January 2001
This Customer Support Ruling
sealing of matter mailed at the Package Services rates of postage.
Domestic Mail Manual
(DMM) 453.2.4*, provides that Package Services matter must be
wrapped or packaged so that it can be easily examined. Package
Services matter is not sealed against inspection. Mailing at
the Package Services rates of
postage constitutes consent by the sender to postal inspection of
the contents whether or not the mail piece is secured. To assure
that packages will not be opened for postal inspection, customers
should, in addition to paying the First-Class Mail rate of postage,
plainly mark their package "First-Class".
Suitcases, duffel bags, and similar containers mailed
at the Package Services rates of postage may not be locked because
then those items could not be easily examined while in the mails.
The fact that a key may be attached to a container has no bearing on
this determination because there may be instances in which the key
may be lost in transit in the mails or otherwise.
*See also DMM 443.3.
United States Postal Service
Washington DC 20260-3436