As of 13 August 2026, AI can write a letter chasing payment.

This still needs a person who signs their name to it.

Can you do it?

5 minutesto a draft.

15 minutesto something you’d act on.

Cost, all in£0

Skill neededchat-fluent

Who has to check ityou

What the alternative costsA suitable specialist alternative is Genie AI, a UK-focused AI legal assistant for drafting and reviewing everyday contracts.

If this goes wrong: the letter states the wrong amount or makes an unjustified threat, damaging the business relationship or creating a dispute.

What to actually do

Hand it to a person
The route this page recommends
A person who owns the outcome does this end to end, worth it when the failure is dear.
Use a tool built for this
Second choice

Do it yourself

The distant third

A chat interface, chat-fluent skill, and roughly 15 minutes until you can act on the result.

How to actually do it

Open the unpaid invoice, the relevant contract or order, and your payment records.
Copy the creditor and debtor details, invoice number, invoice date, due date, amount outstanding and payment instructions into the prompt.
Paste any relevant payment, late-payment or dispute terms exactly as written, and describe any previous contact about the debt.
Run the prompt in a chatbot and copy the draft letter and its checking list into your document template.
Compare every name, address, date, invoice reference and amount against the invoice, contract and payment records, then replace each [CHECK] marker.
Remove any legal threat or reference to court action that is not clearly supported by your contract and circumstances.
Ask a colleague to check the final amount and recipient details if the debt is material, then send the letter using your normal business email or post process.

Prompt

Write a concise, professional UK business letter chasing an overdue payment.

Use only the facts supplied below and do not invent or infer anything. Do not describe the letter as a statutory demand, letter before claim or other formal legal notice unless I explicitly say that it is one. Do not threaten court action, debt collection or interest unless the supplied contract or my instructions expressly support that wording. If any essential fact is missing, put [CHECK] beside it instead of guessing.

Creditor: [business name and address]
Debtor: [customer or business name and address]
Contact name: [name, if known]
Invoice number: [invoice number]
Invoice date: [date]
Due date: [date]
Amount outstanding: [amount and currency]
Goods or services supplied: [brief description]
Previous contact about payment: [brief details or none]
Payment instructions: [bank or payment details, if appropriate]
Preferred response deadline: [date or number of days]
Relevant contract terms: [paste the exact terms, or write none]
Desired tone: firm, polite and non-confrontational

Ask the recipient to confirm when payment will be made. Include a clear subject line, the invoice details, the amount due, a request for prompt payment and a contact route for queries. Keep it to one page. After the letter, list every factual item I must check against my records before sending it, and flag any wording that needs a solicitor's review.

Open it prefilled in ChatGPT or Claude, or copy it into Gemini, which takes no prefill link.

What it gets wrong

AI cannot know whether the customer has a genuine dispute, insolvency issue or complaint unless you provide that context.
AI cannot decide whether the wording amounts to a formal letter before claim or another legal step.
AI cannot take responsibility for the amount claimed, the deadline given or the consequences of sending the letter.
AI cannot replace a solicitor when the debt is disputed, substantial, or likely to lead to court action.

Even on a YES, the friction has a name: legal accountability, judgement under ambiguity and stakes of error.

How we scored this

Five axes, each scored nought to two by hand: ten means AI carries the task cleanly, and the thresholds that turn a total into YES, PARTLY or NO are published in the methodology. Each axis name links to its definition.

Axis	Score (0–2)
Output	2
Inputs	2
Verification	2
Liability	1
Effort delta	2
Total	9 / 10

The methodology and its thresholds are published in full.

FAQ

Can ChatGPT write a letter chasing payment?: Yes. It can draft a routine, professional payment reminder from your invoice, contract and payment records, but you must check every fact before sending it.
What should I include in a payment-chasing letter?: Include the invoice reference, amount owed, due date, goods or services supplied, payment instructions and a clear request for payment. State how the recipient can raise a query and when you want them to respond.
Can AI threaten legal action over an unpaid invoice?: It can produce threatening wording, but that does not make the threat accurate or appropriate. Do not describe the letter as a formal legal notice or threaten court action unless the facts and process have been checked; this is not professional advice, and a serious or disputed case needs a solicitor.
Is it safe to use AI for a debt collection letter?: It is generally suitable for a straightforward reminder when you remove unnecessary personal data and verify the amount, dates and contract terms. It is not suitable as a substitute for legal judgement where the debt is disputed, the customer is vulnerable or legal proceedings are being considered.

Nearby answers

All Documents & templates rulings

Assessed by gpt-5.6-luna (gpt-5.6-luna) on 2026-08-13, second-checked by an independent model. Wrong somewhere? Email [email protected] and it gets re-checked.

The newsletter

AI news, new answers and product picks, straight to your inbox.