How to Check If a Certified Letter Was Delivered

To check if a certified letter was delivered, look up its 22-digit tracking number at tools.usps.com. The number is printed on the PS Form 3800 mailing receipt the clerk handed you at the counter, or in your confirmation email if you bought postage online. Enter it in the tracking field, and the page shows every scan event from acceptance to delivery, usually within seconds.¹

Finding and Entering the Tracking Number

The tracking number for certified mail typically starts with 9407 or another 94-prefix sequence and runs 22 digits. On PS Form 3800 it sits below the barcode. If you can’t find the physical receipt, check your email for a USPS purchase confirmation, or look through your Click-N-Ship history if you printed the label at home.

Go to tools.usps.com/go/TrackAction, type the full number into the search box, and click Track. The results page lists every scan in reverse chronological order, newest at the top. A delivered letter will show the date, time, and ZIP code where it was handed over or dropped in the mailbox. You can also check status by calling USPS at 1-800-275-8777, but representatives see the same data that appears online.²

Reading the Status Updates

Some statuses mean exactly what they say. Others need translation.

In Transit means the letter is moving between USPS facilities. Sub-events like “Arrived at USPS Facility” or “Departed USPS Facility” are normal, and cross-country mail can sit in this status for several days.
Out for Delivery means the letter is on a carrier’s route that day.
Delivered confirms the letter reached its destination. The line may add detail such as “Delivered to Agent” (someone other than the addressee signed) or “Picked Up” (the recipient collected it from the post office).
Notice Left or Attempted Delivery means the carrier tried but nobody was available to sign. A slip is left with pickup and redelivery instructions.
Available for Pickup means the letter is being held at the local post office, usually after a missed delivery. USPS typically holds certified letters about 15 days.
Return to Sender or Unclaimed means the letter is on its way back to you, most often because the address was wrong, the recipient moved, or the hold period ran out.

If the status hasn’t moved for several days and no new scans appear, the letter probably missed a scan at a sorting facility rather than truly disappearing. Keep watching before assuming the worst.

Getting a Signature, Not Just a Scan

Certified Mail on its own gives you a mailing receipt and electronic tracking that confirms delivery or an attempted delivery.¹ It does not automatically produce a signed record you can hand to a court. For that you need the Return Receipt add-on, which captures the recipient’s signature, the delivery date, and the actual delivery address if it differs from what you wrote on the envelope.³

Return Receipt comes in two forms. The physical version is the green PS Form 3811 card that arrives in your mailbox after delivery; it carries its own barcode, so you can track the card itself if it’s slow coming back.³ The electronic version arrives as an emailed proof-of-delivery letter with a digital image of the signature, usually faster and harder to misplace.⁴ If you didn’t buy Return Receipt when you mailed the letter, the online tracking page is your only delivery record.

Restricted Delivery is a separate option that limits who can sign. With it, the letter goes only to the named addressee or to a person the addressee has authorized in writing.⁵ Without it, any adult at the address who appears authorized can accept the letter.

When the Recipient Never Picks It Up

A refusal or an unclaimed letter is still useful evidence if you sent the mail for legal reasons. A tracking history showing “Notice Left” or “Unclaimed” at the correct address documents that you tried to notify the person. Many courts treat an attempted delivery to the right address as sufficient notice for purposes like debt collection, lease termination, and other communications where the obligation is to notify rather than to guarantee actual receipt. Some courts follow up by re-sending the documents via regular first-class mail and presume delivery from there.

Because of that, don’t discard the tracking record just because the letter came back. The record of the attempt is what matters.

Save the Record Before It Disappears

USPS keeps certified mail tracking available online for two years from the mailing date.⁶ After that, the data drops off the public tracking page. If a dispute surfaces three years later, you’ll have nothing to show unless you saved a copy.

Two ways to preserve the record:

Save it yourself, for free. The moment tracking shows “Delivered” (or the final status you’re going to get), print the tracking history to PDF or take a full screenshot. Save any Return Receipt emails to the same folder as the underlying documents.
Buy USPS Tracking Plus. This paid service extends access to tracking history for up to 10 years on domestic items. Pricing in 2026 runs from $2.50 for six months of scan retention up to $8.50 for 10 years with signature retention, and pulling an archived report later costs $10 for a tracking statement or $20 for a signature letter.⁷

For anything tied to a lawsuit, a tax filing, or a contract deadline, saving the record the day it’s delivered is the safer habit.

If Something Looks Wrong

Re-enter the tracking number first. A typo is the most common reason for a “not found” result, and the 22-digit string is easy to mistype.

If the status genuinely hasn’t updated for several days, or if the page says “Delivered” and the recipient insists they never got the letter, call USPS at 1-800-275-8777 with the tracking number in front of you.² A local post office visit can also help, especially when tracking shows the letter reached a nearby facility and stopped moving.

After seven business days with no resolution, submit a Missing Mail search request on the USPS website.⁸ You’ll describe the piece, give the tracking number, and provide the mailing and expected delivery dates. USPS staff then check facilities along the mail’s route. Keep in mind that certified mail doesn’t include indemnity coverage; a Missing Mail search can locate the letter, but USPS won’t reimburse you for its contents if it’s lost.⁹

1
PostalPro. Certified Mail Guidebook
2
USPS. Contact Us – Section: Customer Care Center
3
USPS. Return Receipt – The Basics
4
USPS. Electronic Return Receipt – FAQ
5
USPS. USPS Mail Requiring a Signature – Accountable Mail
6
USPS. USPS Tracking Plus – The Basics
7
USPS Postal Explorer. Notice 123 – January 2026 Price Change
8
USPS. Missing Mail and Lost Packages
9
USPS Postal Explorer. 609 Filing Indemnity Claims for Loss or Damage