Late Payment Notice

What this document is

A late payment notice is a formal written message from a lender telling a borrower that a payment is overdue. It states the amount owed, the original due date, how many days late the payment now is, any late fee the loan agreement allows, and a clear new deadline. In tone and consequence it sits between a friendly reminder and a final demand: firmer than the first, without the finality of the second.

The notice does two jobs at once. It gives the borrower precise facts to act on, since a specific figure and date get paid faster than a vague complaint. And it creates a dated record showing the lender raised the problem formally and gave a fair chance to fix it, which matters if the situation later escalates to a demand letter or a small-claims process.

When to use it

• An installment of THB 10,000 is now 15 days overdue and a friendly reminder sent last week got no response.
• A borrower has started skipping payments intermittently and the lender wants each miss formally on record.
• The loan agreement allows a late fee, and the lender needs to notify the borrower before applying it.
• The relationship is businesslike, such as a loan to an acquaintance, and a formal notice is the appropriate register.
• A lender wants a documented paper trail of overdue amounts before considering a final payment demand.

When not to use it

• The payment is only a few days late and no reminder has been sent yet. Start with a friendly payment reminder letter.
• The borrower has already engaged and asked to reschedule. Negotiate a payment extension agreement instead of escalating.
• You are ready to escalate to legal steps if this letter fails. That is the job of a final payment demand, which says so explicitly.
• The amount is disputed in good faith. Sort out what is actually owed before formally noticing it as overdue.

Information you will need

• Full names of the lender and the borrower, and the borrower's address or usual delivery channel
• Reference to the loan agreement: date and original amount
• The overdue amount and which installment or due date it relates to
• The original due date and the number of days overdue as of the notice date
• Any late fee or default interest the agreement allows, with the clause it comes from
• The total now payable, itemised
• The new payment deadline, typically 7 to 14 days from the notice
• Payment details: account number or accepted payment methods
• The date of the notice and the lender's signature

Clauses included

How to sign it

The notice is signed by the lender only; it is a notice, not a contract. What replaces the borrower's signature is proof of delivery, so send it in a way that leaves a trace: registered mail, email, or a messaging app where the message and the date are preserved.

Keep the tone factual from the first line to the last. State numbers, dates, and the agreement clause behind any fee, and resist commentary about character or history. A notice that reads calm and precise is more likely to be paid, and it reads far better if a third party ever reviews the file.

File the notice with the loan agreement and note the delivery date. If the borrower pays, issue a receipt as normal; if not, this notice becomes the middle chapter of a documented story that a final payment demand may complete.

Common mistakes

• Adding a late fee the loan agreement never provided for, which turns a strong notice into a disputed one.
• Getting the arithmetic wrong, since a single incorrect figure gives the borrower a reason to dismiss the whole notice.
• Writing in anger, with accusations that overshadow the numbers and escalate the conflict instead of the payment.
• Leaving the deadline vague, such as as soon as possible, instead of a specific calendar date.
• Sending it in a way that leaves no proof of delivery, so the borrower can later say it never arrived.
• Threatening specific legal action you have not decided to take, which drains credibility from any later demand.

Frequently asked questions