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Payment Demand Letter for Unpaid Invoices
Most late invoices clear after one clear written demand. Lead with the invoice number, amount, original due date, and a new deadline. Escalate tone only after the first notice is ignored.
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Open Payment Demand Letter →Friendly → firm → final
Start polite and assume good faith. Second notice restates facts and late policy. Final notice states last chance before collections or small claims — still professional, never abusive.
What to attach
Original invoice PDF, statement of work or contract excerpt, delivery proof, and a payment link or wire instructions.
FAQ
How long should I wait between demand letters?
Seven to fourteen days is common. Match whatever your contract says for late notices.
Is this a legal demand letter?
It is a professional demand you can send yourself. It is not a substitute for a lawyer if the amount is large or the client disputes the work.
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