Demanding unpaid rent: current tenant or former tenant
It depends on whether the tenant still lives there. For a current tenant, the demand is usually your state’s pay-rent-or-quit notice, a statutory form with required contents and its own service rules, where certified mail alone often does not count. For a former tenant, it is an ordinary demand letter: the amount, how it was calculated, the deposit you applied, a date to pay by and what you will do next, usually small claims. That letter has no special delivery rule, and Certified Mail with the electronic return receipt is the right way to send it, because the court will ask whether you asked for the money first and when.
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 a landlord owed rent by a former tenant, Piloxa mails the demand by USPS Certified Mail and keeps the exact letter, the address it went to and the delivery record together for small claims.
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.
Which letter you are writing
| Tenant still in the unit | Tenant has moved out | |
|---|---|---|
| What the letter is | Usually a statutory pay-or-quit notice, such as California’s three-day notice to pay rent or quit. | An ordinary demand for money owed. |
| What it does | Gives a fixed, short time to pay or leave, and is the precondition for an eviction case. | Asks for payment by a date before you file a claim. |
| Required content | Set by statute, often down to the exact rent amount due (rent only, not late fees in some states), who to pay and how. | None by statute. Clarity and accurate numbers. |
| How to deliver it | The method the statute lists. In California, CCP 1162: personal, substituted or post-and-mail service. Certified mail is an extra record, not the service. | Certified Mail with the electronic return receipt, to the forwarding address or last known address. |
For the current-tenant notice, start at notices to vacate and eviction notices; an error in that notice can force you to start over. The rest of this page is about the former tenant.
What a demand to a former tenant should include
- The tenancy. The address, the lease date and the date the tenancy ended or the tenant left.
- A ledger, not a total. Each month of unpaid rent, any other charges the lease allows, and any payments received. Attach it.
- The deposit. What you held, what you deducted and why. Most states require an itemized statement within a deadline after move-out (21 days in California under Civil Code 1950.5); the demand should agree with it, and should show the deposit already credited.
- The amount demanded and how to pay. One figure, and the address or account where payment goes.
- A calendar date. Ten to fourteen days is common.
- What happens next. A small claims filing, or a referral to a collection agency. Say only what you will do. A collection agency or attorney collecting for you is bound by federal debt collection rules that do not apply to your own letter, so keep your letter factual and free of threats you cannot carry out.
Sample rent demand letter to a former tenant
Sample — former tenant; adapt every bracketed item
[Landlord or company legal name]
[Address]
[City, State ZIP]
[Date]
[Former tenant full name]
[Forwarding or last known address]
[City, State ZIP]
Re: Unpaid rent — [rental address], lease dated [date]
Dear [Name],
You rented [rental address] under a lease dated [date] at a monthly rent of $[amount]. You vacated on [date]. Rent for [months] was not paid. The enclosed ledger lists each charge and payment.
Your security deposit of $[amount] was applied as set out in the itemized statement sent to you on [date], leaving a balance due of $[amount].
Please pay $[amount] by [calendar date] by [check payable to (name) mailed to the address above / (other method)]. If you dispute any item, write to me at the address above by that date and say which item and why.
If I have not received payment or a written response by that date, I intend to file a claim in [county] small claims court for the balance and any costs the court allows.
Sincerely,
[Name, title]
[Phone or email]
Enclosures: rent ledger; itemized deposit statement; [relevant lease page]
When certified mail is enough, and when it is not
For a former tenant, certified mail is not just enough, it is the standard. Small-claims forms commonly ask whether you demanded payment before filing, and a dated delivery record answers that. If the tenant refuses or never collects the letter, USPS records that too and returns it after 15 days; keep the envelope unopened, and consider sending a copy by ordinary mail or email as well. For the current-tenant pay-or-quit notice, certified mail is a supplement to the statutory method, never a replacement for it, unless your statute names it.
Finding the address is the hard part with former tenants. Use the forwarding address they gave for the deposit, and run it through the recipient address check before you pay. Piloxa prints the address exactly as checked and keeps it in the record, with the exact letter and its SHA-256 fingerprint, so the version you show the court is the version that was mailed.
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 unpaid rent demand to my former tenant by Certified Mail with the electronic return receipt.
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
Should a rent demand letter be sent certified?
To a former tenant, yes: it gives you a dated record that you asked for payment before going to court. To a current tenant, the demand is usually a statutory pay-or-quit notice that has to be served by the method your state lists; a certified copy is an extra record on top.
Can I include late fees in the demand?
In a demand to a former tenant you can claim what the lease allows, itemized separately. In a pay-or-quit notice, some states allow only rent in the amount demanded, and an overstated figure can invalidate the notice. Check your state’s rule.
How long should I give them to pay?
For a former tenant, ten to fourteen days is common and reasonable. A pay-or-quit notice period is fixed by statute, commonly a few days to two weeks, depending on the state.
What if I only have the old address?
Send it to the last known address and any forwarding address you have. If it comes back undeliverable, the returned envelope and the tracking record show you tried, which matters when you ask the court for permission to serve another way.
What does it cost to send?
$15.97 all in for a one-page demand with the electronic return receipt; a ledger and deposit statement add pages. Printing, envelope and postage are included.
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.