Ancillary Endorsements -What are they? Why Use them?

By Paul Johnson, President CMS – Complete Mailing Solutions

Ancillary Endorsements – Why do I care?

If you’re like most companies sending various communications to customers or prospects, you’re faced with an unfortunate fact – your mail doesn’t always reach it’s intended recipient without an ancillary endorsement. With over 11%* of the U.S. population moving each year, and 20% of new businesses failing in their first year+, keeping your mailing list up-to-date is an on-going challenge.
Given these stats, we have to ask: Why would you put anything in the mail if you weren’t 100% sure it would be delivered (especially invoices, statements, checks, etc.) or it would arrive with postage due? How would your Customers react?
We highly recommend you cleanse your database with CASS certified software annually, at a minimum. If for some reason that cannot happen, you’re next line of defense is to use Ancillary Service Endorsements on your envelopes.

What Are Ancillary Service Endorsements?

Ancillary Endorsements allow you to obtain an addressee’s new address (if a change-of-address has been filed with the USPS) or the reason why mail cannot be delivered. It tells the USPS how you want mail handled if there is a problem with the recipient and the address. For example whether you wish your mailpiece to be forwarded to the recipient’s new address, returned to you with updated address information, or destroyed. The endorsements include one keyword: “Electronic,” “Address,” “Return,” “Change,” or “Forwarding,” followed by “Service Requested.” Depending upon which endorsement you use, you’ll receive new address information, either on each mailpiece (via yellow “nixie” sticker) when it’s returned to you, or by a separate card if you want your mail piece forwarded.

Some of these services are free, others are not; for example, First-Class and Priority Mail do not incur fees for forwarding even without an endorsement (although you won’t know there’s a new address), whereas Marketing Mail and Package Services do incur fees for forwarding. The mailer is obligated to pay any applicable fees for forwarding, return and separate address notification charges. Check out the USPS Ancillary Service Endorsements Quick Service Guide for an overview of the specific endorsements available, actions and time limitations for each.

What Is That Yellow Sticker?

Ancillary Endorsements (e.g., Address Service Requested) alerts the Post Office what to do with your mail. The yellow “nixie” sticker on your mail piece alerts you of address changes and issues, such as:

  • The recipient is no longer at the address (unknown, moved, deceased). Notice may or may not have been given to the Post Office.
  • There is missing or incorrect address information (missing apartment or suite number, wrong city or ZIP code).
  • Mail was refused by the recipient
  • No postage was affixed

Why Use Ancillary Endorsements?

The use of Ancillary Endorsements initiates the flow of information from the Post Office, which will help you better manage your communications and avoid communicating with someone who is no longer there. Other benefits include:

  • Timely Information – you’ll receive updated information about the recipient, which will allow you to ensure future mailings are deliverable.
  • Improved Receivables – correct addresses ensure there is no delay in invoices or statements reaching recipients, which helps improve cash flow.
  • Lower Costs – having fresh address information ensures your mail gets to its recipient the first time, every time. No need to reprint and resend – a savings of $25 or more each mail piece! Surprised? See our earlier post on The Cost of Undeliverable Mail .
  • Clean Data – eliminates mailing to someone that may no longer be able to use your services because they have moved from your service area.

You’ll be able to better manage your database and mailings with the help of Ancillary Service Endorsements. 

Best Practices


We recommend the following:

  • CASS certify your data at least 1/x per year.
  • Print envelopes with endorsements. If your current envelope supplier doesn’t know about endorsements, call us about our envelope printing services and assistance with Endorsements.
  • Use your postage meter for Endorsements on the fly – call us to find out how.

Contact us today for information on other tools to keep your mailing lists up-to-date as well as help in determining the best Ancillary Service Endorsements for your mail – 303-761-0681 or envelopes@cms-colorado.com.

* U.S. Census Bureau, 2016 Current Population Survey Annual Social and Economic Supplement (CPS ASEC)
+ Bureau of Labor Statistics, Business Employment Dynamics, March 2016