Chase an unpaid invoice, with different wording for homeowners and landlords

A homeowner who forgot needs a nudge and an easy way to pay; a landlord or agent paying 30 days late on five properties needs a firmer, more formal message. Having both ready in your own voice means you chase the same day it goes overdue instead of letting it drift.

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Steps

1. List what each unpaid invoice is for, the amount, the date issued and the payment terms you gave. Keep customer details to a name and invoice number.
2. Decide your stages: a friendly nudge, a firmer reminder after a set number of days, and a final message that says what you'll do next. Write down what that next step is.
3. Run the prompt below once for a homeowner and once for a landlord or letting agent. Change the tone for the second.
4. Save the versions as templates. Send the first the day after the invoice is overdue.
5. Log each chase against the invoice. If it goes past your final message, decide whether to stop work for that client or take advice on recovering the debt.

The exact prompt

I'm a UK gas and heating engineer. Write a three-stage payment reminder for [homeowner / landlord or letting agent].
Invoice [number] for [£], issued [date], payment terms [x days], work done: [e.g. boiler service, repair, installation]. How to pay: [details].
Stage 1: friendly nudge, 30 words. Stage 2: firmer reminder after [x] days, 45 words. Stage 3: final message, 60 words, saying I will [my next step, e.g. pass it on for recovery / stop taking new work from them].
For a landlord or agent, keep it formal and business-like. For a homeowner, keep it warm. Use only these facts. Don't add interest or fees and don't mention legal action unless I say so.