When a Customer Won't Pay: The Letter of Demand, and What Comes After It

Almost every business owner eventually has a customer who simply doesn't pay — an invoice that goes unanswered, excuses that stretch past a reasonable deadline, or silence altogether. The instinct is often to keep chasing informally for months, which is usually the wrong call: South African law provides a specific, low-cost formal process for exactly this situation, and starting it properly and promptly is generally more effective than an extended run of unanswered follow-up emails.

Step one: the letter of demand

Before any legal action, the debtor must be given formal written notice of what is owed and a real opportunity to pay before things escalate. A proper letter of demand:

• States the facts and the specific amount owed — what the debt is for, the invoice or contract it relates to, and the exact rand figure, not a vague reference to "outstanding amounts".
• Gives the debtor 14 days to settle from the date they actually receive it — the clock starts on receipt, not on the date you sent it, which matters if you're tracking deadlines closely.
• States that legal action will follow if the debt isn't settled within that window — this isn't just a formality; it's what puts the debtor properly on notice.
• Is delivered by hand or registered mail, with proof of delivery kept — an affidavit if delivered by hand, or the registered post receipt if posted. Since 1 April 2023, the standard forms for this are Form 4 (the letter of demand itself) and Form 5 (the affidavit of service), available from any Magistrate's Court.

A demand sent by ordinary email, with no proof it was actually received and no clear 14-day deadline, is weaker evidence later if the matter proceeds to court — it isn't necessarily worthless, but the formal delivery methods exist precisely so you can prove the debtor was properly notified, which matters if they later claim they never knew.

Step two, once 14 days pass unanswered: where the claim goes depends on the amount

If the debt is R30,000 or less, the Small Claims Court is available — and as of 1 August 2026, that limit has been raised from R20,000, meaning a materially wider range of small-business invoice disputes now qualify. The Small Claims Court is genuinely designed for exactly this kind of dispute:

• No legal fees — the process itself is free, and legal representation is not permitted for either side, so there's no attorney's bill to weigh against the amount you're owed.
• You represent yourself, presenting your case directly to a commissioner — typically a practising attorney volunteering their time — who hears both sides and decides.
• The clerk of the court helps you complete the summons once your 14-day letter-of-demand period has passed without payment — bring the letter of demand, your proof of delivery, and copies of the invoice or contract supporting the claim.

For debts above R30,000, the claim proceeds through the ordinary Magistrate's Court or High Court process instead — generally involving a summons issued through an attorney, a more formal (and slower, and costlier) process, but the only route available once a claim exceeds the Small Claims Court's ceiling. Whether pursuing a larger claim is worth the legal cost involved is a real business decision, particularly where the debtor's ability to actually pay once a judgment is obtained is itself in doubt.

Before it gets to a letter of demand: what to check first

A letter of demand is a formal step worth getting right, which means checking a few things before sending one:

• Do you have a clear paper trail? A signed contract, a proper invoice matching what was agreed, delivery confirmation if goods were involved — the stronger your documentation, the stronger your position if the matter is ultimately decided by a court.
• Is the amount genuinely undisputed? If the customer has raised a legitimate quality or delivery complaint rather than simply not paying, that's a different situation requiring resolution of the underlying dispute first, not straight to a demand for payment.
• Do you have the debtor's correct legal details? Whether you're claiming against an individual, a sole proprietor trading under a name, or a registered company matters for who you actually name in the letter of demand and, later, the summons — getting this wrong can cost you time you don't want to lose.

Why acting promptly matters

Debt doesn't become easier to collect with time — a business owner who genuinely couldn't pay six months ago is not more likely to be able to pay now, and a debtor who could pay but is simply avoiding you has more time to spend the money elsewhere the longer this drags on. Prescription (the legal time limit after which a debt can no longer be enforced) also runs in the background — most ordinary commercial debts prescribe after three years from when the debt became due, which sounds like a long runway but is not a reason to delay taking the formal steps once informal follow-up has genuinely failed.

Getting invoicing right reduces how often you need any of this

Much of this risk is reduced upfront by getting invoicing right in the first place — clear payment terms, a proper invoice with the details that actually make it enforceable, and following up promptly rather than letting an overdue account sit unaddressed for months before the first real conversation about it happens.

Sources: the Department of Justice and Constitutional Development's published Small Claims Court guidance (R30,000 monetary jurisdiction limit effective 1 August 2026 per Government Gazette 55038, raised from R20,000; the letter-of-demand requirements including the 14-day period, delivery and proof-of-service methods, and Form 4/Form 5 in use since 1 April 2023). This is general information, not legal advice — a debt above the Small Claims Court limit, a disputed claim, or a claim against a debtor who may be insolvent should be discussed with an attorney before you commit time and cost to pursuing it.

A worked example

A small design studio completes a R18,000 project for a client who then goes quiet after the final invoice is sent, ignoring two follow-up emails over a month. The studio sends a proper letter of demand by registered mail, clearly stating the R18,000 owed, the invoice it relates to, and the 14-day deadline, keeping the registered post receipt as proof. The client still doesn't respond. Because R18,000 falls comfortably under the new R30,000 Small Claims Court limit, the studio takes the letter of demand, the postal receipt, and a copy of the signed project agreement to the clerk of court, who assists with issuing a summons — no attorney's fee, no filing cost, and a genuine, accessible route to a judgment the studio could not have justified pursuing through the ordinary court process for an amount this size.

Frequently asked

Can I sue a company (not an individual) in the Small Claims Court? Yes — the Small Claims Court can hear claims against companies and close corporations as well as individuals, provided the claim amount falls within the R30,000 limit.

What if the debtor pays part of the amount after receiving the letter of demand? A partial payment doesn't resolve the matter — you can still pursue the outstanding balance through the same process, adjusting the claim amount to reflect what remains genuinely owed.

Do I need a lawyer to write a letter of demand? No — a letter of demand does not require a lawyer to draft, provided it contains the required elements (the facts, the amount, the 14-day deadline, and a statement that legal action will follow). Many business owners draft these themselves using the standard Form 4.

What happens if I win in the Small Claims Court but the debtor still doesn't pay? A judgment in your favour is not automatically money in your account — if the debtor still doesn't pay voluntarily, further steps (such as a warrant of execution against their assets) are available to enforce the judgment, a separate process from obtaining it in the first place.

Can I claim interest on the outstanding amount? Yes, in principle, provided your original agreement or invoice terms allowed for interest on late payment, or under the general legal rules on mora interest for money that should have been paid and wasn't — worth including in your claim calculation rather than only claiming the base amount owed.