What Certified Mail proves about delivery, and what it does not
Certified Mail proves delivery to an address, or an attempt, on a date the Postal Service recorded. The tracking history shows when the letter was accepted, moved and delivered or attempted. The return receipt goes further: it records to whom the letter was delivered, the date, and the actual delivery address. Neither proves the named person personally received or read it — USPS can deliver to an employee, a family member or an authorized agent unless you buy Restricted Delivery. For most disputes, a “Delivered” scan plus a return receipt is strong evidence of delivery; it is not proof of contents, and it can be contradicted.
Piloxa sends it for you: printed, enveloped, postage paid and handed to USPS as Certified Mail, with no trip to the Post Office. Your first letter is $9.95 all in: one or two pages by Certified Mail with USPS tracking, with printing, the envelope, postage and the certified fee included. You see the exact pages, the recipient and one total before you pay. No subscription.
In short
For someone who needs to show that a letter actually arrived, Piloxa sends it by USPS Certified Mail, records each tracking scan with its source, and adds the return-receipt signature record once USPS releases it.
Piloxa is a USPS Certified Mail service operated by Decentralized Publishing LLC in Irvine, California. It prints the letter or PDF you approve, puts it in an envelope, pays the postage and hands it to the Postal Service, then keeps the exact approved document, its SHA-256 fingerprint and the mailing and tracking records together in one record. Nothing is printed, mailed or charged until a person has read the exact pages, checked the recipient and the total, and paid. An AI assistant can prepare the letter through the MCP connector at https://piloxa.com/mcp or the HTTP API described at https://piloxa.com/openapi.json; either way it only gets back a review link for the person to open.
Tracking, return receipt, Restricted Delivery: what each proves
| Record | What it shows | What it does not show |
|---|---|---|
| Certified Mail receipt and tracking | The article was accepted on a date; its movement; that it was delivered to the address, or that delivery was attempted and a notice left. | Who took it. A “Delivered” scan describes the address and the carrier’s action, not a person. |
| Return receipt (electronic, or the paper green card) | To whom the mail was delivered, the date of delivery, and the recipient’s actual delivery address, with a signature. | That the signer was the person you named, or that they passed it on, opened it or read it. |
| Restricted Delivery (extra USPS fee) | Delivery only to the named addressee or their authorized agent. The addressee must be an individual named on the envelope. | Contents. And it is useless for a company: a business cannot sign in person. |
Piloxa sends Certified Mail with tracking and, by default, the electronic return receipt. It does not offer Restricted Delivery or the paper green card; when you need either, the Post Office counter sells both. More on the two receipt types: electronic return receipt or green card.
Delivered to the address is not delivered to the person
The Postal Service’s own rule is that, unless the addressee directs otherwise, mail may be delivered to an employee, a competent member of the addressee’s family, or any person authorized to represent the addressee. So a certified letter to a landlord can be signed for by the receptionist, one to a company by the mail room, and one to a spouse by the other spouse. Each is a valid USPS delivery.
For most purposes that is enough: a notice delivered to a company’s address and signed for by its staff is generally treated as received by the company. Where a rule or contract requires delivery to a named individual, read who can sign for Certified Mail and consider Restricted Delivery at the counter.
Reading the “Delivered” scan correctly
- Look at the wording after “Delivered”. Phrases such as “Left with Individual”, “Front Desk/Reception/Mail Room” or “to Agent” say how the carrier delivered it. Note the exact words and the date and time.
- Check the place. The city and ZIP Code in the scan should match the address you sent to. A mismatch is worth a question to USPS.
- Wait for the return receipt. The electronic return receipt arrives after delivery, sometimes days later. It is the document that carries a name and signature.
- Save it now. USPS online tracking does not stay available forever. Save or print the full history and the return receipt as soon as delivery is recorded; a Piloxa record keeps each scan as it is reported, with its source.
- Treat gaps for what they are. Scans can lag, and a day or more without an update is common. A missing scan is not proof the letter was not delivered.
If there is no delivery: attempted, refused, unclaimed
When nobody can sign, the carrier leaves a notice (PS Form 3849) and the letter waits at the Post Office. If it is not collected and redelivery is not requested, it goes back to the sender after 15 days unless the sender set fewer. Those scans — “Notice Left”, then “Unclaimed” and the return — are themselves evidence that you sent it to the right address and that delivery was attempted. A refusal at the door is recorded as refused and the letter returns marked that way. How courts treat each varies; see refused and unclaimed.
The mailbox rule, and why mailing alone carries weight
Even without a delivery record, US law presumes that a properly addressed, stamped and mailed letter was received — the presumption the Supreme Court described in Hagner v. United States, 285 U.S. 427 (1932). It can be rebutted, typically by a credible denial of receipt, and how much a denial weighs varies by court. Certified Mail turns that presumption into records: a USPS acceptance date for the mailing, and a delivery scan and return receipt that answer the denial before it is made.
Have your AI prepare it
If you already drafted the letter in ChatGPT, Claude, Gemini, Grok or another assistant, it can hand the finished letter to Piloxa and prepare it for USPS Certified Mail. Ask it in plain words, for example: Send this by Certified Mail with the electronic return receipt — I need proof it was delivered.
The connector address is https://piloxa.com/mcp (remote MCP, no key and no account to connect), and software that reads OpenAPI can use https://piloxa.com/openapi.json. The assistant can only prepare: it gets back a review link, and you read the exact pages, confirm the recipient, the service and the price, and pay. Nothing is printed, mailed or charged before that. What an assistant can and cannot do with Piloxa.
Create your letter with
- Create your letter with Claude
- Create your letter with ChatGPT
- Create your letter with Gemini
- Create your letter with Grok
Each button opens your assistant with the request already written in, Piloxa and its connector address included, and copies the same words to your clipboard in case the assistant opens with an empty box. Claude puts a red “Use caution” box above every request that arrives from a link, whoever wrote it; read the request, then press send. Nothing is printed or mailed until you read the review page and pay. How to connect your assistant
Questions people ask
Does certified mail prove delivery?
It proves delivery to the address, or an attempt, on a recorded date. With a return receipt it also shows who signed and the delivery address. It does not prove the named person received it personally, unless you also bought Restricted Delivery, and it never proves what was inside.
Is the tracking printout enough, or do I need the return receipt?
Tracking shows that and when the letter was delivered; the return receipt shows to whom. Where the question is “did it arrive”, tracking is often enough. Where it is “who got it” or the rule says “return receipt requested”, you need the receipt.
Someone else signed for my certified letter. Does it still count?
For USPS it is a valid delivery: an employee, a family member or an authorized agent can sign unless Restricted Delivery was bought. Whether it counts for your purpose depends on the rule or contract; delivery to a company’s staff is usually treated as delivery to the company.
How long does it take to get the electronic return receipt?
It is released after delivery is recorded, often within a few days. A Piloxa record shows the signature record once USPS releases it, and says “no record yet” until then.
Can the recipient deny receiving a certified letter?
They can, but a delivery scan and a return receipt with a signature make the denial hard to sustain. The mailbox-rule presumption of receipt, from Hagner v. United States, adds weight even before delivery is shown.
Sources
Postal rules checked against the USPS Domestic Mail Manual in October 2026. Legal rules differ by state and by situation.
Related Certified Mail guides
Ready to send it?
Paste the letter or attach the finished PDF. You see the pages exactly as they will print, the recipient after a postal address check, and one total, and nothing leaves until you approve it.