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Write unpaid-invoice reminders with AI that get a little firmer each time
Ask AI for three short emails, friendly, clear, and firm, using blanks like [CLIENT NAME] and [AMOUNT]. Add your real terms, save them, and send the next one when it's due.
The short answer
Ask AI to write three reminder emails at once: a friendly one for a few days late, a clear one for about ten days late, and a firm one for about three weeks late. Tell it each one gets a little firmer, with no threats and no guilt trips, and to use blanks like [CLIENT NAME] and [AMOUNT] instead of real details. Then add your real payment terms, save all three, and send the next one when it's due. You stay polite, and you stop putting it off.
Why it helps to write all three now
Much of the pain of chasing an invoice is deciding what to say while you're annoyed. If the three emails already exist, sending one takes a minute and doesn't come out sharp. You also stop waiting a month because the right words never came.
Floor vote
What do you usually do when an invoice goes unpaid?
One vote per device. Change it any time.
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The prompt
Paste this into ChatGPT, Claude, or whichever chat tool you use:
Write three short reminder emails for an unpaid invoice.
1) Friendly: a few days past due. Assume they forgot.
2) Clear: about 10 days past due. State the amount and
date plainly and ask when they will pay.
3) Firm: about 3 weeks past due. Polite but direct. Ask for
payment by a specific date and offer a quick call.
Rules: no threats, no guilt, no legal language. Keep each
under 120 words. Use these blanks exactly: [CLIENT NAME],
[INVOICE NUMBER], [AMOUNT], [DUE DATE], [PAYMENT LINK],
[MY NAME]. Don't invent fees or policies.
The blanks matter. You don't need to give an AI your client's name or the amount to get a good email.
What the three can sound like
These are illustrative, not a script you must use:
- Friendly: "Hi [CLIENT NAME], a quick reminder that invoice [INVOICE NUMBER] for [AMOUNT] was due on [DUE DATE]. Here's the link in case it slipped through: [PAYMENT LINK]. Thanks!"
- Clear: "Invoice [INVOICE NUMBER] for [AMOUNT] is now ten days past due. Could you let me know when it will be paid?"
- Firm: "Invoice [INVOICE NUMBER] for [AMOUNT] is three weeks overdue. Please arrange payment by [DATE]. If something is holding it up, reply and we can sort it out on a quick call."
The reminder ladder
- 01FriendlyA few days late
- 02ClearAbout 10 days late
- 03FirmAbout 3 weeks late
- 04CallA short, friendly call
Add only your real terms
If your contract or invoice says there's a late fee, you can mention it in the third email, using your exact wording. If it doesn't, leave fees out. The same goes for pausing work or sending the debt to collections: only say it if it's true and you'd actually do it. AI will happily add a fee you never agreed to, so read every line.
Make them sound like you
Ask one follow-up: "Make these sound like a small business owner who likes this client, not a bank." Then read each one out loud. Cut anything you'd never say.
When to pick up the phone
After the third email, a short, friendly call often works better than a fourth message. Sometimes the invoice went to the wrong person. Sometimes they're having a hard month. You'll learn more in two minutes than in another week of email.
For other customer emails you keep rewriting, here's how to draft customer emails and follow-ups with AI. Before you paste a real message into any chat tool, take the private details out first.
Field check
Field check
Three questions. Honest answers. No score sent anywhere but this page.
01 / 03
Have you drafted all three reminders?
Short close
Write all three reminders today: friendly, clear, firm. Use blanks, add only your real terms, and send each one on schedule. You're not being rude. You're being clear about work you already did.
Keep these
The working rules
Chasing money feels rude, so people wait. Then: Ask for three reminders at once; Use blanks, not real details; Add only your real terms; Save them and send on schedule.