To send Certified Mail, fill out a green PS Form 3800, stick its barcoded label on a First-Class Mail or Priority Mail envelope, and hand it to a Post Office clerk who postmarks your mailing receipt. Add a Return Receipt (the green PS Form 3811 card or the electronic version) if you also want the recipient’s signature in hand.
Certified Mail gives you proof that you mailed something on a specific date and a USPS record of delivery, which is why it is used for legal notices, tax filings and contract terminations. The steps below follow the current USPS rules, including the December 2025 postmark change that makes the counter postmark more important than before.
What is Certified Mail and what do you get?
Certified Mail is a USPS extra service you add to First-Class Mail or Priority Mail. It gives you a mailing receipt at the time of mailing, a tracking number, and a USPS record of delivery that includes the recipient’s signature. You can check the delivery status online or by phone with the article number on your receipt.
Certified Mail does not speed the letter up, and it does not insure the contents. It is a proof service: it documents that you sent the item and that USPS delivered it or attempted delivery. Our Certified Mail glossary entry covers the rules behind the service in more depth.
| Option | What it adds | Form or method | Available with |
|---|---|---|---|
| Certified Mail | Mailing receipt, tracking, delivery record with signature | PS Form 3800 | First-Class Mail, Priority Mail |
| Return Receipt (hardcopy) | The signed green card mailed back to you | PS Form 3811 | Added to Certified Mail |
| Return Receipt (electronic) | An emailed copy of the delivery record and signature | Selected at mailing | Not available to APO/FPO/DPO and some U.S. territories |
| Certified Mail Restricted Delivery | Only the named addressee or their authorized agent can sign | Marked at mailing | Addressee must be a named individual |
| Certified Mail Adult Signature | Delivery only to an adult 21 or older with ID | Commercial labels | Priority Mail only, not sold at retail |
How do you send Certified Mail at the Post Office?
Sending Certified Mail at a Post Office counter is the most reliable method, because the clerk postmarks your receipt in front of you. The whole process takes a few minutes.
- Prepare the envelope. Write the recipient’s full name and address and your return address in the upper left corner, then seal it. Certified Mail works with First-Class Mail letters and large envelopes and with Priority Mail.
- Pick up PS Form 3800. The green and white Certified Mail forms are free at the Post Office. Write the recipient’s name and address on the receipt portion so your copy shows exactly who you mailed it to.
- Attach the barcoded label. Peel the green label with the barcode and article number and place it on the address side of the envelope, above the delivery address and to the right of the return address.
- Add a Return Receipt if you want one. For the hardcopy version, fill out PS Form 3811 with your address as the return destination, attach it to the back of the envelope, and write “Return Receipt Requested” above the delivery address. For the electronic version, ask the clerk to add it at mailing.
- Choose any other extras. Tell the clerk if you want Restricted Delivery so that only the named person can sign.
- Ask the clerk to postmark your receipt. The clerk round-dates the PS Form 3800 receipt with the date of mailing, and can record the time if you ask. Pay the postage and extra-service fees.
- Keep the receipt. The postmarked receipt is your proof of mailing, and its article number lets you track the letter.
You can also attach the label, detach and date the receipt yourself, and drop the envelope in a mailbox. That still creates a delivery record, but you lose the clerk’s postmark, which is often the piece of evidence that matters most.
Can you send Certified Mail without going to the Post Office?
Yes, with limits. USPS sells Certified Mail at the retail counter, but the Domestic Mail Manual also lets mailers use a non-barcoded Label 3800-N when the envelope carries a mailer-generated label with an Intelligent Mail package barcode. Businesses and USPS-approved online postage services use this route to print Certified Mail labels and hand the letters to a carrier or drop them at the Post Office.
The trade-off is the postmark. Without a clerk round-dating a paper receipt, your proof of the mailing date is the electronic acceptance scan, so check that the provider records it before you rely on it for a deadline.
Why does the postmark matter for Certified Mail in 2026?
A USPS rule that took effect on December 24, 2025, added section 608.11 to the Domestic Mail Manual and states that a postmark date does not necessarily match the day USPS first accepted the mailpiece. Machine postmarks reflect the first automated processing operation, which can fall a day or more after you drop the letter off.
For tax returns, court filings and other deadline-driven mail, USPS points senders to a manual postmark at a retail counter or a Certificate of Mailing. Certified Mail sent at the counter gives you both a dated receipt and a delivery record, which is why many professionals use it for anything with a filing date. If you are writing to the IRS, our guide on how often the IRS picks up Certified Mail explains what happens after your letter arrives.
Should you choose a hardcopy or electronic Return Receipt?
Certified Mail alone stores the recipient’s signature with USPS. A Return Receipt sends a copy of that delivery record to you, and you choose the format at the time of mailing.
| Feature | Hardcopy (PS Form 3811) | Electronic Return Receipt |
|---|---|---|
| What you receive | The green card with the recipient’s original signature | An email with the delivery record and signature image |
| How it reaches you | Mailed back to your address | |
| Speed | Takes the return trip through the mail | Sent once delivery is recorded |
| Restrictions | Required with Adult Signature options | Not available to APO/FPO/DPO and some territories |
| Best for | Situations where a physical signed card is expected | Fast proof and easy digital record-keeping |
Some attorneys and agencies still ask for the physical green card, so check the requirement for your notice before you choose. Our USPS tracking and return receipt guide explains how to read each type of proof.
How do you track Certified Mail after you send it?
Enter the article number from your PS Form 3800 receipt at USPS Tracking on usps.com, or call 1-800-ASK-USPS (1-800-275-8777). The record shows acceptance, movement through the network, delivery attempts and final delivery.
If nobody is available to sign, the carrier leaves a PS Form 3849 notice. USPS sends a second notice after 5 days and holds Certified Mail for 15 days in total before returning it to you as unclaimed. The recipient can schedule redelivery online or pick the letter up at the Post Office during that window.
What happens if the recipient refuses or doesn’t pick it up?
A refused letter comes back to you marked “Refused,” and an uncollected one comes back marked “Unclaimed” after the hold period. In both cases the returned envelope and the tracking record show that USPS attempted delivery, and many legal-notice rules treat that as relevant evidence, although the rules vary by state and by type of notice.
Keep the returned envelope sealed if you may need it as evidence, together with your postmarked receipt. Certified Mail can also be delivered to a PO Box: the recipient gets a notice in the box and signs for the letter at the counter.
Is Certified Mail the same as Registered Mail?
No. Certified Mail proves mailing and delivery but travels in the regular mail stream. Registered Mail is USPS’s most secure service: items are sealed, kept under controlled custody and signed for at each step, and it can include insurance for valuables. Use Certified Mail for documents where the proof matters, and Registered Mail for irreplaceable or valuable contents.
Certified Mail is also a domestic service only. For letters abroad, Registered Mail is available on First-Class Mail International to many countries.
How much does Certified Mail cost?
You pay First-Class Mail or Priority Mail postage plus a separate Certified Mail fee, and each extra such as a Return Receipt or Restricted Delivery adds its own fee. USPS changes these fees periodically, so we do not list amounts here. The current breakdown is in our Certified Mail cost guide.
If you also send packages, ParcelPath offers USPS rates up to 89% off and UPS rates up to 85% off for those shipments, with no subscription and free USPS pickups. You can compare USPS and UPS package rates in the ParcelPath calculator; Certified Mail letters themselves are bought from USPS.
Frequently Asked Questions
What form do I need to send Certified Mail?
You need PS Form 3800, the green and white Certified Mail form available free at any Post Office. Its barcoded label goes on the envelope and the receipt stays with you. If you want the signed delivery record mailed back, you also attach PS Form 3811, the green Return Receipt card, or ask the clerk for an electronic Return Receipt.
Can I send Certified Mail from a mailbox?
Yes. You can attach the PS Form 3800 label, detach and date the receipt yourself, and drop the envelope in a collection box. USPS still records delivery, but you will not get a clerk’s postmark on your receipt. For deadlines, a counter postmark is stronger proof, especially after USPS’s December 2025 postmark rule.
How long does USPS hold Certified Mail if no one signs?
USPS holds Certified Mail for 15 days after the first delivery attempt. The carrier leaves a PS Form 3849 notice, a second notice follows after 5 days, and if the recipient neither picks it up nor schedules redelivery, the letter returns to the sender marked “Unclaimed” at the end of the 15 days.
Which mail classes can I send as Certified Mail?
Certified Mail can be added to First-Class Mail and Priority Mail. That covers letters, large envelopes and Priority Mail packages. It is not available for international mail; for letters abroad, use Registered Mail with First-Class Mail International where the destination country accepts it.
Sources
- USPS Domestic Mail Manual 503: Extra Services (Certified Mail, Return Receipt, Restricted Delivery)
- USPS: Insurance and Extra Services
- USPS FAQ: Second and Final Notice and Return Dates for Redelivery
- USPS Domestic Mail Manual 608: Postmarks and Postal Possession
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Part of our USPS Click and Ship guide. Related: Shipping Labels: Complete Guide, How to Ship with USPS, Best Way to Mail, and How to Ship to a PO Box.
