Guides
Guides for pack-and-ship stores
Opening a store, renting mailboxes and the words the trade uses, each written from the USPS rules and the carriers’ own program pages, with every source linked and dated.
How to open a pack-and-ship store
What a shipping store sells, how independent stores get access to UPS, FedEx and USPS, and what goes behind the counter.
Read the guide →CMRA compliance for mailbox rentals
Registering as a CMRA with PS Form 1583-A, signing up box holders on PS Form 1583, the USPS registration database and the quarterly certification.
Read the guide →Pack-and-ship store glossary
Plain definitions of the terms a shipping store meets: CMRA, PMB, Form 1583, ASO, FASC, dimensional weight and more.
Read the guide →Sources checked 31 October 2026. Compare pack-and-ship software →