[YOUR NAME / BUSINESS]
[ADDRESS]
[DATE]

[CLIENT NAME / BUSINESS]
[ADDRESS]

RE: FORMAL DEMAND FOR PAYMENT — Invoice [#1234], [$TOTAL]

Dear [CLIENT NAME],

This letter is a formal demand for payment of [$TOTAL], comprising
invoice [#1234] dated [INVOICE DATE] for services rendered
([BRIEF DESCRIPTION]) plus late fees per our agreement dated [DATE].

Previous attempts to resolve this were made on [DATE 1], [DATE 2],
and [DATE 3]. As of today, the balance remains unpaid.

If full payment is not received within [14] days of the date of this
letter, I intend to pursue all available remedies, including filing a
claim in small claims court, without further notice. Court costs and
any allowable interest will be added to the amount sought.

Payment may be made by [METHODS]. Contact me at [PHONE/EMAIL] with any
questions.

Sincerely,

[SIGNATURE]
[YOUR NAME]
