Payment reminder letter: written to be filed

A reminder letter is a document: date, references, amount, due date, days overdue and the next step. A final notice adds a deadline and states what happens after it.

Try it on your own invoice

5 documents free. PDF, photo or XML — data out as CSV, Excel or JSON.

Format

Your details, the client's details, the date, and a clear subject line with the invoice number.

One paragraph of facts, one of the request, one of the consequence.

Required details

Invoice number, amount, due date, number of days overdue.

Payment instructions, including bank details or a link.

Final notice

Same structure plus: a deadline and a specific next step (collection, legal, suspension of service).

Send it by a channel that proves delivery, and keep the proof.

Tone

No adjectives, no history of the relationship, no apology for asking.

The letter exists so that a third party can understand the situation in thirty seconds.

Frequently asked

Can a letter be an email attachment?

Yes, as long as a copy is filed and the sending is provable.

Do I need a lawyer to send one?

No for a reminder or a final notice. Legal steps require advice — that is a different document.