Enforcement in India · The step where most matters settle

Demand notice for unpaid invoices: what it must contain, and why it works

Shraddha Rathod · Published 5 September 2026 · Guide · 8 min read

Shraddha Rathod

Shraddha Rathod

Head of B2B Collections, Kenstone Capital

B.Com, LL.B; PG Diploma in Cyber Law and Forensics, NLSIU Bengaluru · Profile

In one sentence

A demand notice for an unpaid invoice is a formal written demand stating the parties, the basis of the claim, the amount, a date to pay and the specific proceedings that will follow — and it is the step at which most commercial debts that get paid are paid.

Key takeaways

  • A demand notice states the claim, the documents, the amount, a date and the consequence — and opens the window in which most commercial debts that get paid are paid.
  • There are three different notices with different rules: an ordinary legal notice, a Section 8 IBC demand notice, and a Section 138 NI Act notice. Using the wrong one wastes the step.
  • A notice drafted for the instrument that will follow is worth more than one drafted as a threat.
  • Serve it properly, at the registered office, with proof. A notice that cannot be proved served did not happen.

Why the notice is the step that matters

Until a notice arrives, a debtor is dealing with a supplier's reminders. After it arrives, the debtor is dealing with a stated consequence, a date, and — if it is drafted well — the visible shape of what comes next. That is why most commercial matters that settle do so in the weeks after the notice. The notice is not a threat; it is the point at which the consequence becomes credible.

Legal notice for recovery of money: what the ordinary demand notice must contain

  1. The parties. Who is owed and who owes, with registered names and addresses.
  2. The basis of the claim. The contract, purchase orders or course of dealing; the invoices by number, date and amount; the delivery or acceptance.
  3. The amount. Principal, and interest where the contract or statute provides for it, calculated to a date.
  4. The history. Reminders sent, promises made and broken, disputes raised and answered — briefly. This is where the file built during recovery pays for itself.
  5. The demand and the date. Pay the sum within a stated period.
  6. The consequence. What proceedings will follow if payment is not made — stated specifically (a summary suit; a Section 9 petition; a Section 138 complaint) and only if the creditor intends to bring them.
  7. Service. Sent to the registered office and known business addresses by a mode that generates proof — registered post with acknowledgement, courier with proof of delivery, and email where the contract or dealings support it.

The three notices, and why they differ

An ordinary legal notice has no statutory form; its strength is its specificity and its credibility. A Section 8 demand notice under the Insolvency and Bankruptcy Code is a statutory step with a prescribed form, served on a corporate debtor with a copy of the invoice, and it starts a short statutory window in which the debtor must pay or notify a pre-existing dispute — see the Section 9 guide. A Section 138 notice under the Negotiable Instruments Act follows a dishonoured cheque and must be served within a strict statutory period of the dishonour memo, giving the drawer a fixed period to pay. Each opens a different route; the drafting differs; the deadlines on the second and third are unforgiving.

How to draft the notice for what follows

There is no statutory legal notice format for an ordinary demand; the seven elements above are the format. What varies is emphasis.

A notice written to lead into a summary suit reads differently from one written to lead into a Section 9 petition. The first emphasises the written instruments and the liquidated sum; the second emphasises the operational debt, the absence of dispute and the corporate debtor's default. Decide the instrument first — that is the assessment step on Enforce — and draft the notice for it, so that nothing is wasted if the window closes without settlement.

What not to put in a notice

Consequences that are not available. Threats of criminal action where no offence exists. Deadlines you will not act on. Language you would not want a judge to read. The notice is stronger for being calm.

If you are outside India

A foreign supplier owed by an Indian company has the same remedies as a domestic creditor, and needs a partner on the ground to run them. How collection and enforcement work for international suppliers — timelines, the Section 9 lever, foreign judgments and awards — is on Debt collection in India for international suppliers.

Sources and regulation

InstrumentWhat it doesSource
Insolvency and Bankruptcy Code, 2016 — Section 8; IBBI Rules, Form 3 and 4Statutory demand notice by operational creditoribbi.gov.in
Negotiable Instruments Act, 1881 — Section 138(b)Notice to the drawer after dishonour, within the statutory periodindiacode.nic.in
Code of Civil Procedure, 1908 — Order 37Summary suit — the instrument an ordinary notice often precedesindiacode.nic.in
Limitation Act, 1963 — Section 18A notice is not an acknowledgement by the debtor; a reply admitting the debt may beindiacode.nic.in

Thresholds, limitation periods and procedures change. This guide describes the position as generally understood at the time of writing and is not legal advice; confirm the current rule before acting.

If this is your situation: a debtor has left no other route and you want the notice to count.

How enforcement works

Questions people ask

What is a demand notice for an unpaid invoice?

A formal written demand from the creditor or its lawyers stating the claim, the documents, the amount, a date to pay and the proceedings that will follow if payment is not made.

Is a demand notice mandatory before suing for recovery of money?

Not for an ordinary civil suit, but it is standard practice and often decisive. For a Section 9 IBC petition and a Section 138 NI Act complaint, a statutory notice is mandatory and time-bound.

How long should a demand notice give the debtor to pay?

An ordinary notice commonly gives a short period of days to a few weeks. The Section 8 IBC and Section 138 NI Act notices carry statutory periods that must be observed exactly.

Can I send a demand notice myself?

Yes, though a notice from a firm carries more weight and is drafted for the instrument that follows. Whoever sends it, keep proof of service.

How do you send a legal notice for recovery of money?

Set out the parties, the invoices and documents, the amount with any interest, the history of reminders and promises, a date to pay and the proceedings that will follow; serve it at the debtor's registered office by a mode that generates proof of delivery, and keep that proof.

Can a legal notice be sent by email?

Email can accompany a notice and is often effective, but for a notice that must be proved — a Section 8 IBC notice or a Section 138 notice — serve it by registered post or courier with acknowledgement as well. Courts look for proof of service.

Can a legal notice be sent without a lawyer?

A business can send its own demand notice. A notice from a firm carries more weight, and statutory notices under the IBC and the NI Act have prescribed forms and deadlines where a mistake is fatal.

What happens if a legal notice is not received?

Service at the registered office by a mode with proof is generally treated as good service even if the debtor claims not to have received it; a notice sent to a wrong address is not. Serve at the registered office and keep the proof.

Discuss your receivables

Tell us where you are on the curve. A practitioner — not a sales desk — reads every enquiry and replies within one working day.

+91 80 6824 8827
info@kenstonecapital.in

CallWhatsAppEnquire