What does a Certified Mail letter look like?
By Justin Winter · Updated August 22, 2026
A Certified Mail piece is a normal envelope with a green-and-white Certified Mail sticker and tracking barcode on the front, containing a normal business letter — date, recipient address, RE line, body, and signature — and paperplane prints, stamps, and mails that exact setup for $12.99.
If you have never sent Certified Mail before, it helps to see one before you write one. Below is a labeled mockup of the envelope USPS hands back a tracking number for, and the letter that typically goes inside it. Nothing here is a real sticker or barcode — it is a diagram showing what each part is and where it goes.
The envelope
CERTIFIED MAIL®
9407 1000 0000 0000 0000 00
US POSTAGE
$6.37
Jordan Ellis
142 Maple St, Apt 3
Columbus, OH 43201
Sunrise Property Management
Attn: Legal Department
900 Corporate Pkwy, Suite 200
Columbus, OH 43215
- Certified Mail sticker — the green-and-white label USPS applies. It carries the barcode and the long tracking number USPS scans at each stop.
- Postage — First-Class postage plus the Certified Mail fee, applied as a stamp or a printed indicia. We total this for you: $6.37 in raw USPS fees, or $9.28 with electronic Return Receipt.
- Return and recipient address — formatted exactly like a normal letter; Certified Mail does not change the address block at all.
The letter
Date — March 4, 2026
Recipient address
Sunrise Property Management
Attn: Legal Department
900 Corporate Pkwy, Suite 200
Columbus, OH 43215
RE line — RE: Return of Security Deposit, 142 Maple St Apt 3
Dear Sunrise Property Management,
Body — states the facts, the dates, and what you are asking for, in plain numbered or short paragraphs. This is the part a template fills in for you.
[ … letter body … ]
Sincerely,
Signature
Jordan Ellis
- Date — the date you are sending it, which matters if you are working against a legal deadline.
- Recipient address — should match the envelope exactly; this is what USPS delivers against.
- RE line — one line naming the subject, so whoever opens it (often a mailroom or legal department) can route it fast.
- Body — the facts and the ask, kept short and specific.
- Signature — your name, typed or signed, closing the letter.
Start from a real template instead of building this from scratch
The mockup above shows the shape of a Certified Mail letter. For the actual wording, start from one of our letter templates — they are built for the situations people usually reach for Certified Mail:
- Demand letter template — for money owed, a broken agreement, or any formal demand you want a paper trail for.
- Security deposit demand letter template — for a landlord who has not returned your deposit on time.
- Browse all letter templates — the full list, including landlord notices, appeals, and general correspondence.
Once you have the wording, we print it, apply the Certified Mail sticker and postage shown above, and hand it to USPS — no trip to the post office, no separate label to fill out.
Common questions
Do I need special paper or a special envelope for Certified Mail?
No. Certified Mail is a service USPS applies to a normal envelope — regular paper, a regular #10 envelope. The only thing that makes it "Certified" is the sticker and barcode USPS puts on the outside and the mailing receipt it generates; the letter inside is formatted like any other business letter.
What does a Certified Mail sticker look like?
It is a green-and-white USPS label, roughly the size of a large postage stamp, usually applied near the top right of the envelope. It has a barcode down one side and a long tracking number (starts with 9407 or similar) printed underneath — that number is what lets you track the letter to delivery.
Can I just print this mockup and use it?
No — the envelope and letter below are a labeled diagram, not a real Certified Mail sticker or a usable barcode. USPS generates the actual sticker and tracking number when a Certified Mail piece is accepted. To send something for real, start from one of our letter templates and we handle the printing, the sticker, and the mailing.