Key takeaways
- For a 1-oz letter with a stamp: $0.82 leaves no USPS record; $3.27 adds a Certificate of Mailing, which records the mailing date; $6.37 buys Certified Mail and delivery status; $9.28 adds the signature by email.
- Rules name different methods for similar notices: New York requires certified mail for a landlord's notice that rent is five days late, Arizona's nonpayment notice goes in hand or by registered or certified mail, and a Texas landlord's notice to vacate can go by First-Class Mail.
- Signature Confirmation can't be added to a First-Class letter, Certified Mail can't be added to Priority Mail Express, and FedEx and UPS can't send Certified Mail at all.
Cheaper alternatives to Certified Mail record less, so choose by what you'd need to show later. To show when you mailed a letter, use a Certificate of Mailing: $3.27 in total with a 1-ounce stamped letter, against $6.37 for Certified Mail. To show it arrived, use Certified Mail: it adds delivery or attempted-delivery status you can look up by the article number on your receipt. Our guide to how Certified Mail works explains what it records and where that record stops.
One check comes before price: if a lease, statute, court or agency names how a notice must be sent, use that method. A cheaper option fits only where the rule allows it.
What each option costs and what it records#
Each row is the total for a 1-ounce letter with a stamp, lowest price first.
Option | Total, 1-oz stamped letter | Fits when | What USPS gives you |
|---|---|---|---|
First-Class letter | $0.82 | No rule names a method, and you only need it delivered | No USPS record or tracking; keep a copy and note the date |
Certificate of Mailing | $3.27 | No rule requires a different method, and you need to show when you mailed it; or the rule accepts a certificate of mailing | Postmarked PS Form 3817 showing the date you mailed it. Bought at the counter when you mail; USPS keeps no copy; no delivery record |
Certified Mail | $6.37 | You may need to show it arrived, or the rule names certified mail | Mailing receipt; delivery or attempted-delivery status by article number; USPS keeps the signed delivery record |
Certified Mail + electronic Return Receipt | $9.28 | You want the signature in your own file | Certified Mail's record, plus the signature by email after you request it on USPS Tracking |
Registered Mail, no declared value | $21.72 | The rule names only registered mail, or the item is irreplaceable | Mailing receipt and delivery or attempted-delivery status; no scans in transit; secure manual handling that can slow delivery |
A mailed (green card) Return Receipt instead of the emailed one brings Certified Mail to $11.02. A postmark alone isn't on the list: USPS says postmarking is not a proof-of-mailing service. To pay less for Certified Mail itself, see the certified mail cost guide.
Will a cheaper option hold up? Check what your rule names#
Find the wording in your lease or contract's notices clause, the statute, the court rule or the agency's instructions; if more than one applies, such as your lease and a state law, check each. If the wording names a service, such as certified mail, buy exactly that service, plus any add-on it names, such as a return receipt. If nothing you can find names a method, choose by what you'd need to show later: when you mailed it, or that it arrived.
Landlord and tenant notices#
Three examples of the notices a landlord sends when rent goes unpaid show how much states differ. They aren't a survey, and one state can set different methods for different notices. Check the rule for the exact notice you're sending, and your lease.
- New York. If rent isn't received within five days of its due date under the lease, the landlord must send the tenant written notice of the missed payment by certified mail (Real Property Law § 235-e (opens in new tab)).
- Arizona. The written notice of nonpayment goes to the tenant in hand or by registered or certified mail (A.R.S. §§ 33-1368 (opens in new tab) and 33-1313 (opens in new tab)).
- Texas. Since January 1, 2026, a landlord's notice to vacate, or notice to pay rent or vacate, can go by mail, including First-Class, registered or certified mail, or by a delivery service, among other methods (Property Code § 24.005 (opens in new tab)).
Where the rule allows ordinary mail, as Texas's does, and you're mailing three or more notices at once, list them on a Certificate of Mailing firm sheet, PS Form 3665, for $0.75 a piece (minimum three pieces) instead of $2.45 per PS Form 3817, plus postage. A firm sheet doesn't replace certified or registered mail where the rule names one.
Landlords sending a late rent reminder can start with our late rent notice guide, which covers when that notice is a courtesy and when the lease or a statute sets how it must be sent. Moving out as a tenant? Our letter to landlord templates include a notice to vacate, with the mailing method that fits it.
IRS filings and payments#
Under 26 U.S.C. 7502 (opens in new tab), a federal tax return or payment that arrives after the due date counts as filed or paid on time if it was properly addressed, had enough postage, and was mailed in the U.S. with a postmark dated by the due date. You carry the risk of a late postmark, and USPS says its machine postmark may be dated after the day you mailed it. With Registered Mail, or Certified Mail whose receipt the clerk postmarks, the receipt's date counts as the postmark date (26 CFR 301.7502-1(c) (opens in new tab)).
If a return or other tax document never arrives, your receipt still matters: proof that you sent the document, properly addressed, by Registered Mail or with a postmarked Certified Mail sender's receipt is prima facie evidence that the IRS received it. That presumption covers documents, not payments. The regulation says no other evidence of mailing has that effect, so a Certificate of Mailing isn't a substitute (26 CFR 301.7502-1(e)(2), as amended by T.D. 9543 in IRB 2011-40 (opens in new tab)).
Contracts, agencies and courts#
For a notice under a contract, read its notices clause for the method, the address and when notice counts as given. Agencies and courts name their own methods in their forms, instructions and rules. Serving court papers by mail? Our certificate of service guide covers when ordinary mail is allowed and what to keep.
Letters no rule covers#
For a letter no rule governs, such as a courtesy invoice reminder to a client, send it First-Class and keep a dated copy as your record.
If you don't have a printer or stamps, Postmarkr prints your letter and mails it First-Class, from $2.05 for a one-page black-and-white letter, postage included. Your dashboard records when you ordered and when your letter went to print, plus USPS scan updates when USPS provides them; that record is Postmarkr's, not a USPS receipt, and it shows a USPS date only if a scan arrives. Postmarkr doesn't send Certified Mail and can't add a Certificate of Mailing.
Signature Confirmation and Priority Mail Express: for packages and speed#
Signature Confirmation records the date and time of delivery or attempted delivery, and USPS keeps a delivery record that includes a signature, which you can request by email. It's available with Priority Mail, USPS Ground Advantage and some package services, not with First-Class Mail, so it can't be added to an ordinary stamped letter. On Priority Mail it costs $5.15 at a Post Office or $4.15 through the electronic option, plus postage; the Post Office option comes with a USPS mailing receipt, and the electronic option doesn't.
It isn't Certified Mail, and USPS's mailing standards note that some statutes for legal documents may require Certified Mail or Registered Mail instead. For a signature on a letter, use Certified Mail with a Return Receipt.
Priority Mail Express is for speed: USPS states a delivery window of 1–3 days to most addresses. Certified Mail can be added to First-Class Mail or Priority Mail, but not to Priority Mail Express, so when a rule names certified mail, Priority Mail Express on its own isn't that service.
FedEx and UPS: when a rule allows a private carrier#
FedEx and UPS can't send Certified Mail; it's a USPS service. What they give you is their own delivery record, which fits a notice where the rule allows a delivery service.
Two examples. For federal tax returns and payments, the IRS designates specific DHL Express, FedEx and UPS services for the on-time mailing rule above; another service from the same carrier doesn't count (IRS list of private delivery services (opens in new tab)), and only USPS can deliver to an IRS P.O. box (IRS Publication 509 (opens in new tab)). A Texas landlord's notice to vacate can also go by a delivery service, as above.
Otherwise, read the rule before you use FedEx or UPS: if it names certified or registered mail, only USPS offers either.
Registered Mail: secure handling, not a cheaper record#
Registered Mail costs $20.90 plus postage with no declared value ($21.72 with a 1-ounce stamped letter), and the fee rises with the value you declare. It gives the same kinds of record as Certified Mail: a mailing receipt and delivery or attempted-delivery status. The higher fee buys handling: USPS processes it by hand under secure procedures, which can slow delivery, and doesn't scan it as it moves between facilities.
Choose it for something irreplaceable when secure handling matters more than speed, or where a rule names only registered mail. Our Certified Mail hub sets the two side by side.
Before you mail: get the record you chose#
A record helps only if you buy it at the right time and keep it.
- Copy the rule's exact wording into your file, including the method and whether its deadline runs from mailing or from receipt.
- Buy the record when you mail. USPS sells a Certificate of Mailing only at the time of mailing, and you buy Return Receipt at the same time. For an electronic Return Receipt, you then request the signature on USPS Tracking with your article number; our guide to electronic certified mail covers what it documents.
- Mail Certified Mail at the counter and ask for a postmark on your receipt, so it shows the date USPS accepted the letter. Drop it in a mailbox and you date the receipt yourself.
- Keep an exact copy of what you sent with the receipt.
General information about mailing, not legal advice. For a notice with legal consequences, confirm the method with the governing rule or an attorney.