[header] How to mail packages faster [title] Use a sturdy box (or envelope) with packing or strapping tape on all the seams. [step] If the envelope or box opens in transit, the post office will need to reassemble it, and it will take a lot longer. [title] Print your return address and the recipient's address. 
[title] Use the 9-digit zip code. [step] Go to usps.com () and look up the recipient's address.