Send a collection letter for an unpaid invoice
Tell Genie who owes you and for what. It drafts a firm, professional letter, we verify the business address, and mail it.
First-Class from $4.99 · Certified Mail $14.99 with tracking and a delivery record
What this letter is
A collection letter for an unpaid invoice is a written demand for payment on work already delivered. For a freelancer, contractor or small business, it is the step between emails that get ignored and either a collections agency or small claims — and it is far cheaper than both. Its job is to move the invoice out of a client's inbox and onto someone's desk, with a date attached.
What to put in it
- Your business name, address and contact details.
- The invoice number, date, amount and the work it covers.
- The original due date and how many days past due it now is.
- Any late fees or interest your contract or invoice terms allow.
- A specific payment deadline and how to pay.
- What happens after the deadline, stated factually.
- A copy of the invoice and the signed contract or purchase order.
Email to a late payer is easy to ignore and easy to claim was never received. A mailed letter reaches the office physically, reads as a business escalating, and — sent Certified — comes with a delivery record you can put in front of a court.
From a prompt to the post office in 3 steps.
- 1
Describe it
Say what happened in plain words. No forms, no templates to pick.
- 2
Genie drafts & checks
It writes the letter in the right tone and finds the recipient's address.
- 3
Preview and send
Approve the exact letter and we post it. Certified adds tracking and a delivery record.
Good to know.
Can I send several of these?
Yes — each letter is priced on its own, from $4.99 First-Class or $14.99 Certified, with no subscription. Many small-business senders run a First-Class reminder first and a Certified demand second.
Can I attach the invoice and contract?
Yes. Upload them and they are printed and mailed behind your letter; Genie can also pull the invoice number, dates and amounts into the draft. Letters run up to 12 pages.
Can I send it to a business found by name?
Yes. Enter the company name and Genie searches for a mailing address, checked against postal databases before you pay. Address lookup is best-efforts, so confirm it before approving.
*PostalGenie is a technology tool, not a law firm. Letters generated through PostalGenie are not legal advice and may not satisfy specific legal notice requirements. Consult a qualified attorney for legal matters.
Other letters Genie sends.
Send a collection letter for an unpaid invoice, today.
You say it. Genie writes it, addresses it, and gets it in the mail.
Start your letterDisclaimers
- Prices are shown exclusive of sales tax; applicable sales tax is calculated and added at checkout. The base price covers a one-page letter ($4.99 First-Class, $14.99 Certified Mail); for multi-page letters, $0.49 per additional page and a one-time $5.99 large-letter fee (7 or more pages) are added and shown before payment. The handwritten style is an optional $1.99 add-on, also shown before payment. Letters may be up to 12 pages.
- Genie is an automated AI system, not a person. It drafts each letter from the information you provide and does not add facts or claims you did not supply. AI-generated output may vary or contain errors; you are responsible for reviewing and approving the final letter, and no letter is mailed without your approval.
- Address lookup and verification rely on third-party data and are provided on a best-efforts basis. Accuracy is not guaranteed; you are responsible for confirming the recipient’s address before sending.
- Delivery times are estimates, not guarantees. Statutory deadlines, notice periods and filing requirements vary by state, contract and program — check the ones that apply to you.