How to Certify Mail: Forms, Costs, and Proof of Delivery

To certify mail through USPS, fill out PS Form 3800 at the post office, stick the barcode label on your envelope, hand it to a clerk with your postage, and keep the postmarked receipt. If you also want proof that the recipient signed for it, add PS Form 3811 (the green return receipt card) before you send. A standard one-ounce letter runs $6.08 for Certified Mail alone, or about $10.48 with a hard-copy return receipt.

What You Need Before You Start

Certified Mail is an add-on to First-Class Mail or Priority Mail, not a separate class of shipping. It doesn’t travel faster than regular mail. What you’re paying for is a paper trail: a postmarked mailing receipt, a tracking number, and a record of who signed at the door.¹ It works only for domestic addresses, including U.S. territories and APO/FPO/DPO military addresses. You can’t send it internationally.²

Before you head to the post office, decide two things. First, do you want the signature record mailed back to you? If yes, you’ll add a return receipt. Second, does it matter who signs? By default, anyone at the address can accept the piece. If only the named recipient will do, or only an adult, you’ll add a signature restriction.

Grab the forms you need at any post office lobby. They’re free. Bring your sealed envelope with the recipient’s address and your return address already written on it.

Filling Out the Forms

PS Form 3800 — Certified Mail Receipt

This form gives you your tracking number and your proof of mailing. Write the recipient’s full name and complete address in the blanks. Peel the barcode label off the top of the form and stick it on your envelope above the delivery address, keeping it clear of the address block and your return address. Hand the bottom stub to the postal clerk, who will postmark it and give it back. That postmarked stub is your mailing receipt — hold onto it.³

PS Form 3811 — Return Receipt (Optional)

If you want a signed card mailed back to you, fill out the green PS Form 3811. Write your own name and address on the front, since that’s where USPS will return it. Fill in the recipient’s name and address on the other side. Copy the article number from the barcode strip on Form 3800 into the designated box. Peel the adhesive strip and stick the card flat against the back of the envelope.⁴

A cheaper alternative is the electronic return receipt, which sends you a digital image of the recipient’s signature instead of the physical card. It carries the same evidentiary weight.⁵

Certified Mail doesn’t include insurance. If your contents have monetary value, buy insurance separately, and package the item to survive normal handling.

Where to Drop It Off

You have three ways to send it.

Post office counter. The most common route. The clerk weighs the piece, applies postage, postmarks your receipt, and catches any errors on your forms.

Self-service kiosk. Many post office lobbies have automated kiosks that handle Certified Mail and Return Receipt services, often outside regular counter hours. Availability varies by location.

Online shipping services. Third-party services like Stamps.com let you print Certified Mail labels at home, including electronic return receipts. With a printed label, you can hand the piece to your carrier or drop it in a collection box.⁶ USPS’s own Click-N-Ship platform does not currently support Certified Mail labels.⁷

What It Costs

The Certified Mail fee is $5.30 per piece, added to regular postage.⁵ A one-ounce First-Class letter runs $0.78 in postage, for a minimum total of $6.08.⁸ Add-ons layer on top:

Hard-copy return receipt (green card): $4.40, for about $10.48 total on a one-ounce letter.
Electronic return receipt: $2.82, for about $8.90 total.
Adult Signature Required: $9.70.
Adult Signature Restricted Delivery: $10.00.
Restricted Delivery with Certified Mail: $13.70.⁹

Tracking It and Getting Your Proof

Your mailing receipt has a tracking number. Enter it at usps.com to watch the piece move: accepted, in transit through sorting facilities, out for delivery, delivered or delivery attempted.¹

If you paid for the green card, it comes back to your mailbox after the recipient signs, showing the signature, delivery date, and delivery address. The electronic version delivers a scanned signature image through the USPS website.³

USPS keeps delivery records only for a limited period, and that window isn’t clearly published. Download or print your tracking confirmation as soon as delivery shows, and file your return receipt the day it arrives. Don’t count on pulling records years later.

When No One Signs

Because Certified Mail requires a signature, an empty house means no delivery. The carrier leaves a peach-colored PS Form 3849 notice telling the recipient a certified piece is waiting. USPS leaves up to two notices — a first notice and a final notice — before the hold period ends.¹⁰ The recipient can schedule a redelivery or pick the piece up at the local post office. If nothing happens within 15 days, USPS returns the piece to you on day 16.¹²

Making Sure the Right Person Signs

Standard Certified Mail can be signed for by anyone at the address: a spouse, a roommate, an office receptionist. When you need the named recipient personally, or at least an adult, add a signature restriction.

Restricted Delivery tells the carrier to hand the piece only to the addressee or to someone the addressee has formally authorized as an agent, and USPS may check ID.11USPS. What is Restricted Delivery This is the option most often used for legal documents where you need proof that a specific person, not just their household, received the mailing.

Adult Signature Required tells the carrier that whoever signs must be at least 21, verified by photo ID.¹³ Combining both restrictions is available as Adult Signature Restricted Delivery.

Using It as Legal Proof

Most people certifying mail are building a record for court, a government agency, or a contract dispute. Here’s what that record actually proves.

A postmarked mailing receipt proves you sent something on a specific date. A signed return receipt proves someone at the delivery address received it. Together they create what courts call a presumption of proper mailing and receipt, which shifts the burden to the other side to prove they didn’t get it. That’s the practical value: they have to disprove receipt, not you prove it.

When you present this evidence, you’ll usually prepare an affidavit of service. The exact format varies by jurisdiction, but the affidavit generally states that you sent the documents by Certified Mail with return receipt requested, identifies the recipient, lists the address, notes the date the recipient signed, and attaches the signed return receipt. Most jurisdictions require the affidavit to be signed under oath before a notary or court clerk.

One limit to keep in mind: Certified Mail proves that an envelope reached someone, not what was inside it. For legal service, keep copies of every document you enclose, and consider including a cover letter that itemizes the contents. Some attorneys photograph the documents next to the addressed envelope before sealing it.

Don’t Confuse It With a Certificate of Mailing

A Certificate of Mailing sounds like Certified Mail and does something very different. It gives you a receipt showing the date you dropped a piece in the mail, and nothing else: no tracking, no delivery confirmation, no signature, no return receipt.¹⁴ It’s useful when all you need is proof that you sent something by a deadline, like a tax return postmarked before April 15. If you need proof the recipient actually got the mailing, Certified Mail with a return receipt is the service to buy.