To return mail delivered to the wrong address, write “Not at this Address” or “Return to Sender” clearly on the front of the unopened envelope, near the address block, and put it back in your mailbox with the flag up. Your carrier will collect it on the next delivery round. You don’t need to add postage, and you don’t need to explain anything — the original postage covers the return, and the marking tells USPS what to do.
The Steps, Start to Finish
Grab a pen and write the endorsement on the front of the piece, near the address block. Either “Not at this Address” or “Return to Sender” works. Don’t cross out the address, and don’t scribble over the barcode along the bottom edge. That barcode is what sorting machines read, and covering it forces the piece into slower manual handling.
Once it’s marked, you have three ways to get it back into the system:
- Drop it in your own mailbox and raise the flag. Your carrier checks for outgoing mail every trip.
- Use any blue USPS collection box. They’re emptied on a set schedule.
- Hand it to a clerk at the post office counter for immediate processing.
No postage is required for misdelivered First-Class Mail. The sender already paid, and USPS processes the return at no charge.1USPS.com. Return to Sender Mail
What If You Opened It by Accident
Nothing bad happens. Federal law on obstructing correspondence requires intent — the statute applies to someone acting “with design to obstruct the correspondence, or to pry into the business or secrets of another.”2Office of the Law Revision Counsel. 18 USC 1702 – Obstruction of Correspondence Tearing open a letter you thought was yours, then seeing a stranger’s name, isn’t remotely the same thing.
Reseal the envelope with tape, write “Opened by mistake — Return to Sender” on the outside, and drop it back in your mailbox. Carriers handle resealed returns as a routine matter.
One rule to know for next time: once you’ve opened a piece of mail, USPS considers it accepted. If you ever want to refuse something addressed to you personally, you have to do it before breaking the seal; otherwise you’d owe return postage yourself.3Postal Explorer. Customer Support Ruling – Mailpieces Opened After Delivery
Why It Keeps Arriving
Most misdelivered mail traces back to a previous resident who either never filed a change-of-address form or whose forwarding order has run out. USPS forwards First-Class Mail for 12 months after a permanent move, and periodicals for just 60 days. After those windows close, anything still addressed to the old name gets returned automatically — which is why sending it back matters, since the sender learns the address is stale only when the piece bounces.
Other causes are simpler: a missing apartment number, a typo in the street address, a house number that doesn’t match the route.
Marketing Mail Is a Different Story
Writing “Return to Sender” on catalogs, coupon packets, and other USPS Marketing Mail often does nothing. Unless the sender printed a specific endorsement like “Address Service Requested” or “Return Service Requested” on the piece, USPS discards undeliverable marketing mail rather than returning it.4United States Postal Service. Domestic Mail Manual 507 – Mailer Services
If a former resident’s junk mail keeps piling up, the return-to-sender route won’t stop it. Contacting the sender directly to get the address removed from their list is the only reliable fix, and the Direct Marketing Association’s mail preference service can help with broader opt-outs.
Packages from FedEx, UPS, and Amazon
USPS handles USPS mail. A FedEx box with “Return to Sender” scrawled on it and dropped in your mailbox will confuse everyone. Each private carrier has its own retrieval process:
- FedEx: Contact customer service by phone, online, or through their virtual assistant to open a misdelivery case. A driver comes to pick up the package and reattempt delivery to the correct address, typically the same day or the next business day.5FedEx. What Happens If My Package Was Delivered to the Wrong Location
- UPS: Call 1-800-PICK-UPS to arrange a retrieval. UPS will send a driver to collect the package and reroute it.
- Amazon: If Amazon shipped the item, the intended recipient should contact Amazon customer service within 30 days of the expected delivery date. For third-party seller items, the buyer contacts the seller directly.
Don’t open a package that isn’t addressed to you, whatever carrier brought it.
Stopping a Former Resident’s Mail for Good
Returning pieces one at a time works, but it’s tedious if mail for someone who used to live at your address keeps arriving month after month. Visit your local post office and ask to speak with the postmaster or a supervisor. Let them know the named person no longer lives there, and they can update the carrier’s records so delivery stops under that name.
For First-Class Mail, the problem usually resolves within 12 months on its own, because that’s the outer limit of USPS forwarding records for an old address. Marketing mail and magazine subscriptions from companies that never update their lists can outlast that window by years, and going back to the sender is the only way to get the address struck for good.