USPS shows you how to send a letter or postcard in the U.S., from choosing an envelope, writing the address, buying and applying stamps, and finding a drop-off location.

Mailing Standards of the United States Postal Service Publication 28 - Postal Addressing Standards October 2024 PSN 7610-03-000-3688 Transmittal Letter 1 Introduction 11 …

You can find information on common hazardous, restricted and perishable materials in the summarized USPS.com Shipping Restrictions page, and the detailed Publication 52, …

Learn how to use USPS to send letters from the U.S. to other countries: What you can send, how to write addresses, ways to buy postage, and more.

A missing or a bad directional can prevent your mail from being delivered correctly. Use the free ZIP Code Lookup and the ZIP+4 code lookup on the Postal Explorer website (left frame) to …

This format helps us process and deliver your mail more efficiently. Although no system can be up-to-date 100% of the time, this system is very accurate and is updated regularly to include …

Letters, bills, greeting cards, and other documents can be sent in standard white, manila, or recycled paper envelopes. Items needing extra protection can be sent in bubble-lined, padded …

Step 2: Address the envelope: On the bottom center of the envelope, write the address you want your letter delivered to. Start by writing the recipient's name; on the next line, write their street …

Endorsements are instructions from mailers to USPS that tell us what to do with mail that cannot be delivered as addressed. Mailpieces sent from businesses, financial institutions or …

1 Letter-size Basics 1-1 Types of Letter-size Mail 1-2 Physical Standards for Letters 1-3 Address Placement for Letters 2 Machinable and Automation Letters and Cards 2-1 Physical Standards …