First-Class
A printed letter sent through USPS.
For everyday correspondence. Does not include Certified tracking.
Small business
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 $3.99 · Certified Mail $9.99 with tracking and a delivery record
Prices shown cover a one-page letter. Extra pages and applicable tax cost more; review your total before paying.
See a sample before you start.
A complete fictional example. Genie drafts your letter from your own details, and you review every word.
John Doe
123 Happy Place
Anytown, US 12345
September 16, 2026
Acme Design Studio
123 Acme Way, Suite 200
Anytown, US 12345
Dear Accounts Payable Team,
I am following up on invoice JD-104 for brochure layout services completed on August 12, 2026. The invoice was issued on August 13 for $450.00 and was due on September 12. My records show that the full balance remains outstanding.
The invoice relates to the final brochure layout delivered to your team on August 12. I am asking about the original invoiced amount only and have not added interest or late fees in this reminder. Please let me know if an internal approval or missing document is delaying payment.
Please arrange payment using the instructions on the invoice, or contact me at john.doe@example.com if you need another copy or have a question about the balance. If payment has already been sent, please share the payment date and reference so I can update my records.
Sincerely,
John Doe
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 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.
Choose how to mail it.
Drafting, printing, postage, and handling included. No subscription.
Good to know.
Can I send several of these?
Yes — each letter is priced on its own, from $3.99 First-Class or $9.99 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 drafts and sends it.
Draft my payment requestDisclaimers
- Prices are shown exclusive of sales tax; applicable sales tax is calculated and added at checkout. The base price covers a one-page letter ($3.99 First-Class, $9.99 Certified Mail); for multi-page letters, $0.49 per additional page (and a one-time $5.50 large-letter fee for 6 or more pages) are added and shown before payment. Handwriting, a voice note and read aloud are optional $0.99 add-ons each, offered where available and 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.