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AI assistant setupFree templateAdded 15 Oct 2026

Follow up on unpaid invoices without hurting the relationship

An assistant drafts polite, dated payment reminders from your invoice list, and a named person approves each one and handles any dispute.

Use it when For suppliers, manufacturers, agencies and service firms that chase payments by memory, too late or too bluntly, and want to keep good customers.

It is a simple text file. Open it in any text editor, or paste it into ChatGPT, Claude or Gemini and ask for help filling it in.

How to use it

  1. Fill in the business details, the reminder steps and the tone rules below. Keep the steps to what you would be comfortable saying to the customer's face.
  2. Give the assistant the brief and the invoice list. Ask it to draft only the reminders that are due today under your steps, each one quoting the invoice number, date, amount and due date from the list.
  3. The named person reads each draft against the invoice list, edits or holds it, and sends it themselves. Anything the customer disputes moves to the dispute route and stops getting reminders.
What you will need before you start
  • Your current list of unpaid invoices (a sheet or an export from your accounting software) with invoice number, date, amount, due date and customer contact
  • The payment terms you agreed with each customer, as written on the order, contract or invoice
  • One person who will approve reminders and speak to customers when something is disputed

The template

Fill in the blanks for your business. This is what you get when you download or copy it.

Business and owner

Business:

What you sell and to whom (one line):

Where the unpaid invoice list lives:

Person who approves and sends reminders:

Backup when that person is away:

Person who handles disputes and payment plans:

Reminder steps

Write the steps you actually want, counted from the invoice due date. Leave out any step you would not take with your best customer.

Step 1 (friendly note):

  • When (days before or after the due date):
  • Channel (email, WhatsApp, call):
  • What it says in one line:

Step 2 (firm reminder):

  • When:
  • Channel:
  • What it says in one line:

Step 3 (owner to owner call or message):

  • When:
  • Who makes it:
  • What it says in one line:

Customers who never get automatic drafts (key accounts, family or long-standing relationships, government buyers):

What happens after the last step (and who decides it):

Tone and wording rules

Words and phrases we use:

Words and phrases we never use (threats, penalties, legal terms unless the owner approves):

Always include: invoice number, invoice date, amount, due date, how to pay, a name to contact.

Language for each customer if not English:

What the assistant may and may not do

The assistant may:

  • Draft reminders that follow the steps above, using only details from the invoice list
  • Point out invoices with missing details, wrong contacts or amounts that do not match
  • List which invoices are due for which step today

The assistant may not:

  • Send anything on its own
  • Change an amount, a due date or the payment terms
  • Mention interest, penalties, legal notices or any law unless the owner has written that exact wording
  • Offer discounts, payment plans or extensions
  • Reply to a customer who disputes the invoice

Dispute and exception route

Signs that a reminder must stop (customer says the goods were short, damaged, late, or the amount is wrong):

Who takes it over and by when:

Where the dispute is recorded:

When reminders can start again (and who decides):

Stop rules

  • No reminder goes out without the named person reading it against the invoice list first.
  • If an invoice is disputed, or the customer has already promised a payment date, stop drafting reminders for it until the owner says otherwise.
  • Do not invent amounts, dates, interest figures or past conversations. If a detail is missing from the list, leave it blank and flag it.
  • Do not mention legal remedies, interest under any law or a complaint to any authority unless the owner has checked the wording with an accountant or lawyer.
  • If a reminder would feel wrong to send to this customer in person, do not send it.
See an example

A made-up example, so you can see what a filled-in version looks like.

This is an illustrative scenario, not a client case study or a measured result. Do not reuse its details as facts about your work.

A sample family-run corrugated box maker in Peenya supplies cartons to FMCG brands. The daughter, who runs accounts, keeps unpaid invoices in a shared sheet and chases them by phone when she remembers. She wants reminders to go out on time without upsetting buyers the business has worked with for years.

Sample inputs

Demonstration inputs only. Invoice numbers, customers and amounts are placeholders, not real figures. The sheet has columns for invoice number, invoice date, buyer, amount, due date, buyer contact and notes. One row reads: invoice [INV-A], buyer [Buyer A], amount [amount], due date [date], notes empty. Another reads: invoice [INV-B], buyer [Buyer B], notes "buyer says one lot was damaged". The father wants to keep calling his oldest buyer himself.

Example output

Business and owner

[Fact within this demonstration] Approver and sender: the daughter. Backup: the father. Disputes: the father.

Reminder steps

[Fact within this demonstration] Step 1: friendly email a few days before the due date. Step 2: firm WhatsApp note after the due date. Step 3: the father calls. The oldest buyer is never drafted for; the father handles that account.

Today's drafts

[Inference] Invoice [INV-A] is due for step 1. Draft: "Hello [contact name], a quick note that invoice [INV-A] dated [date] for [amount] is due on [date]. Payment details are below. Please let me know if anything is needed from our side. Thanks, [daughter's name]." Invoice [INV-B] has a damage note, so no reminder is drafted. It moves to the father under the dispute route.

Stop rules applied

[Recommendation] The daughter reads the [INV-A] draft against the sheet before sending it. No interest or legal wording is used. Whether to mention any payment rule is for the owners to decide with their accountant. This recommendation is not the business's decision.

How to tell it is done well

Every reminder quotes the invoice number, date, amount and due date exactly as in the list; each draft matches a written step; disputed invoices and excluded customers got no drafts; no interest, penalty or legal wording appears without owner approval; the named person read and sent each reminder; missing details were flagged, not guessed.

Where a person should decide

The template helps you chase payments politely and on time; it does not give legal or accounting advice, check what a customer actually owes, or decide whether any payment law applies to you. Ask your accountant or lawyer before mentioning interest or legal remedies. A filled template is not approval to send reminders, change terms or contact a customer. Keep consequential actions with the named human owner.

The template helps you chase payments politely and on time; it does not give legal or accounting advice, check what a customer actually owes, or decide whether any payment law applies to you.

Edit your own copy on this site
About this version

New in Kosh at version 1.1. Provider-neutral Markdown instructions; no installation or platform compatibility is implied. Runtime behaviour has not been verified across AI providers. Reuse terms have not yet been published. Background reading: The Human Checkpoint Checklist. Building practical AI support around one workflow, with handover and review rules, is Kramaniti's Systems Engineering work.

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