Understanding Return Addresses with LetterStream

Getting Started

This article explains what a return address is, why it’s required for every mailing processed through LetterStream, and what additional options are available.

In This Article

What Is a Return Address?

A return address (also known as the sender's address) is used by the USPS to return undeliverable mail. Including a return address ensures:

  • Failed deliveries are returned to you
  • USPS can process your mail correctly
  • Your mailing complies with USPS regulations

In addition to USPS requirements, a return address helps recipients quickly understand who the letter is coming from. Mail that does not include a return address — or better yet, a recognizable sender name — may not be treated with the importance you intend.

Letters without a clear sender can be perceived as junk mail or as mail from someone intentionally hiding their identity, which may cause recipients to ignore or discard it without opening. Including a clear return address and sender name helps build trust, improves open rates, and ensures your message is taken seriously.

Default Return Address

Before submitting your first mailing through LetterStream, you’ll be prompted to add a default return address. This is required because:

  • Every piece of mail must include a valid U.S.-based return address
  • Missing or invalid return addresses may cause delivery delays or USPS rejection

You can override the default return address for individual jobs if needed.

Using a Return Address Logo

You have the option to add a logo or image in place of your return address:

  • Black and White Printing: Free of charge
  • Color Printing: $0.15 per recipient

Ensure that your image includes the actual return address within the artwork. For step-by-step instructions, click here.

International Return Addresses

Currently, LetterStream does not support international return addresses. Here's why:

  • Mailings are paid for using domestic U.S. postage
  • If the USPS cannot deliver the letter, it must return it to a U.S.-based location
  • International returns require additional postage not covered in the original mailing