Hi [Name], a quick note that invoice [#] for [amount] was due on [date]. Could you let me know when I can expect payment? The invoice is attached again for convenience. Thanks!
Hi [Name], invoice [#] is now 14 days overdue. Under our agreement payment was due on [date]. Please arrange payment by [new date]. If something is blocking it, tell me today and we will find a solution.
Hi [Name], this is a final notice for invoice [#]. If payment is not received by [date], I will pause work on [project] and the late fee in section [x] of our agreement will apply. I would prefer to resolve this directly.
Keep a calm tone, quote your contract and give a date. The full escalation sequence is in the Starter Kit.
General information, not legal or tax advice.