Understanding Returned Mail (Yellow “Nixie” Labels)
Returned mail happens when USPS can’t deliver your piece — often due to a bad address or the named person no longer living there. Open Letter Connect checks every mailing address against the USPS database to confirm it’s real, but USPS doesn’t verify who lives there. To improve deliverability, add “or Homeowner” to the name so it can go to anyone at that address.
What Returned Mail Means
Returned mail is simply mail the USPS couldn’t deliver to the address provided. Instead of discarding it, USPS sends it back to the return address with a yellow “Nixie” label explaining why.
Common Reasons for Returns
The address is invalid or no longer active
Recipient moved without a forwarding address
Property is vacant
Delivery was refused
Missing apartment/unit number
USPS database could not match the address
How Open Letter Connect Helps
Runs every address through the USPS database to verify and standardize it before mailing
Confirms the address exists — but not the occupant
Adding “or Homeowner” to the name tells USPS to deliver to the current resident, reducing returns
Best Practices to Reduce Returned Mail
Add “or Homeowner” to recipient names
Regularly update your mailing list with new data
Remove addresses from previous returns
Collect full address details (including unit/apartment numbers)
