Section 4 of the Negotiable Instruments Act, 1881 defines a promissory note as "an instrument in writing (not being a bank-note or a currency note) containing an unconditional undertaking, signed by the maker, to pay a certain sum of money only to, or to the order of, a certain person, or to the bearer of the instrument." The definition is short, exhaustive, and judged strictly. An instrument that fails any of the seven elements packed into the definition is not a promissory note — even if commercial parties habitually treat it as one.
The provision is the gateway for two parties — the maker (the debtor who signs the undertaking) and the payee (the creditor, present or by endorsement). Its commercial function is to create a freely transferable record of indebtedness on which the holder may sue in his own name. The chapter that follows reads Section 4 alongside the leading cases on intention, certainty and the popular-sense test that the courts have layered over the bare statute. For the wider scheme of which Section 4 is a part, see the Negotiable Instruments Act notes hub.
Statutory text and the seven essentials
Unpacked, Section 4 yields seven essentials. The instrument must be (1) in writing; (2) signed by the maker; (3) contain an express undertaking or promise to pay; (4) the promise must be unconditional; (5) the sum payable must be certain; (6) the parties must be certain; and (7) the payment must be in money only. Each is a separate gate. Failing any one excludes the document from Section 4. The definition under Section 13 then in turn excludes the document from the Act altogether.
Essential 1 — In writing
The promise must be reduced to writing. An oral promise to pay a sum of money is not a promissory note, however solemn. No particular form of words is prescribed; a promise contained in a letter will suffice if the other essentials are satisfied. Date and place of execution are not essential — the instrument is valid without them, though their omission may have evidentiary consequences. The phrase "for value received" is conventional but not essential; consideration is presumed under Section 118 and need not be recited.
The instrument must, however, be stamped in accordance with the Indian Stamp Act, 1899 either before or at the time of execution. An unstamped promissory note is inadmissible in evidence under Section 35 of the Stamp Act and no suit can be maintained on it. The procedural consequences feed into the wider presentment rules for instruments that must be put before the maker for payment. The point is procedural rather than substantive — an unstamped instrument is still a promissory note in form, but the holder cannot sue on it.
Essential 2 — Signed by the maker
The instrument must bear the signature of the maker. The signature need not be at the foot; it may appear anywhere on the document so long as the maker intends to authenticate. A signature by mark, by initials, or by an authorised agent is sufficient. Where a partner of a firm signs, the firm is bound if the partner is acting within the scope of the firm's business. The execution test under the Stamp Act treats execution as the act of signing.
Essential 3 — An express undertaking to pay
This is the most heavily litigated essential. The instrument must contain an express promise to pay; an implied undertaking inferred from a mere acknowledgement of debt is insufficient. Illustration (c) to Section 4 — "Mr. B, I.O.U. Rs. 1,000" — is the textbook negative example. So is the formulation "I have borrowed Rs. 1,000 from X and I am accountable to him for the same." Each is a mere acknowledgement; neither is a promissory note.
Equally, the words "I promise to pay" are not sacramental. The Punjab High Court in Bal Mukand v. Munnalal Ramjilal AIR 1970 Punj 516 held that the absence of those words is not fatal so long as the document, read as a whole, indicates a promise to pay. Conversely, the use of the words is not enough by itself if the document is otherwise a mere acknowledgement.
An acknowledgement followed by an undertaking to pay is good. Illustration (b) to Section 4 — "I acknowledge myself to be indebted to B in Rs. 1,000 to be paid on demand for value received" — is a valid promissory note. The Madras High Court in T. Chettiar v. A. Chettiar AIR 1971 Mad 290 upheld a document reading "I have already received Rs. 15,000 from Colombo AS Shop... I shall pay it after two years on demand by you with interest at two annas per month per Rs. 100... and receive back this promissory note" as a valid Section 4 instrument.
The Gauhati High Court in Surjit Singh v. Ram Rattan Sharma AIR 1975 Gau 14 upheld a document reading "We have received the sum of Rs. 9,240 from Sh. Ram Rattan Sharma. The above amount will be repaid on demand. We have received Rs. 9,240 in cash today" as a valid promissory note. The acknowledgement of receipt was held not to defeat the promissory-note character because the document contained an unconditional undertaking to repay.
The phrase "payable" is not enough
The phrase "payable" without more does not constitute a promise. "Rs. 5,000 payable after two years" is not a promissory note because there is no undertaking — only a statement that an amount is payable. By contrast, "payable on demand" implies a present obligation and is treated as a promise to pay on demand. The expression "on demand" is technical: it means the amount is payable immediately, no actual demand is required, and limitation runs from the date of the instrument. "After demand" or "when demanded," by contrast, requires an actual demand and limitation runs from that date.
Essential 4 — The promise must be unconditional
Certainty is the great object of negotiable instruments. A promise to pay only on the happening of a contingency is not a Section 4 instrument because it is uncertain on its face whether the obligation will ever crystallise. Section 4, paragraph 2 carves a narrow saving: a promise to pay on the happening of an event that is, in the ordinary experience of mankind, certain to occur — even if the time of its happening is uncertain — is treated as unconditional. The standard illustration is a promise to pay 15 days after the death of a named person; the death is certain, the date is not, but the promise is good.
Examples of conditional and therefore invalid promises drawn from the cases:
- "I promise to pay X at my convenience" — Nathoobha v. Himatlal 23 Bom LR 1231.
- "I promise to pay X Rs. 500 if he supplies me goods."
- "I promise to pay B Rs. 500 seven days after my marriage with C" — Illustration (f) to Section 4.
- "I promise to pay B Rs. 500 out of money due to me from D as soon as D pays it."
- "I promise to pay B Rs. 500 on D's death, provided D leaves me enough to pay that sum" — Illustration (g) to Section 4.
- "I promise to pay the proceeds of a shipment of goods valued at Rs. 2,000" — payment out of a particular fund is conditional, since the fund's existence is uncertain.
Each fails Essential 4 and is therefore not a Section 4 promissory note. The maker may still owe the amount on a contractual cause of action; he simply does not owe it on a promissory note. The conditional/unconditional distinction reappears in the discharge of parties regime under Sections 78 to 90.
The doctrine is settled. Your application of it isn't.
Topic-tagged MCQs from previous-year papers and original mocks — calibrated to actual exam difficulty.
Take the civil-law mock →Essential 5 — Certainty of the sum payable
The sum payable must be certain. "I promise to pay B Rs. 500 and all other sums which shall be due to him" — Illustration (d) to Section 4 — fails because the further amount is uncertain. "I promise to pay B Rs. 500, first deducting any money which he may owe to me" — Illustration (e) to Section 4 — fails for the same reason: the deduction makes the residue uncertain on the face of the instrument.
Section 5, paragraph 3 (which applies to bills of exchange and is read into Section 4 by parity) saves three formulations. The sum is treated as certain even though it includes (a) future interest at a stated rate, (b) payment at a stated rate of exchange or in accordance with a stated rate of exchange, or (c) on default of an instalment, the unpaid balance becomes due. A promise to pay Rs. 1,000 plus interest at four per cent per annum is therefore a valid promissory note. The same certainty principle governs the cheque definition under Section 6. Where, however, the rate of interest is not specified, the courts have differed: Official Liquidator v. Bishan Singh 1968 ALL LJ 171 held the instrument invalid for uncertainty of the sum, whereas Seth Tulsidass Lalchand v. Rajagopal (1967) 2 MLJ 66 read in the rate of 18 per cent under Section 80 of the Act and upheld the instrument.
Essential 6 — Certainty of parties
There must be two parties — a maker and a payee. The maker cannot make the note payable to himself; "I promise to pay myself" is a nullity because the same person cannot be promisor and promisee. Such an instrument may, however, become operative when the maker endorses it: a blank endorsement converts it into a bearer instrument; a special endorsement converts it into an order instrument in favour of the indorsee. The mechanics of conversion are covered in the chapter on kinds of indorsement.
The payee must be designated with reasonable certainty, but absolute precision of name is not required. Section 5, paragraph 4 (read into Section 4) provides that the payee will be regarded as a certain person though he is misnamed or designated by description only. Payment to "the Manager of the State Bank of India, Jaipur" or to "the Registrar of the University of Delhi" satisfies the test. The Madras High Court's decision in Vallaimuthu Chettiar on the description "son of Palaniandi Chettiar" upheld the note where the lender was identifiable from the surrounding evidence even though only one of four sons had in fact lent the money.
Where the payee cannot be identified at all from the instrument, the document fails. The Bombay decision in Lala Jethaji v. Bhagu (1901) 3 Bom LR 699 held that an unconditional promise contained in a bahi-khata (account book) reading "the amount was payable to you" was not a promissory note because the person intended by "you" could not be ascertained from the instrument itself.
Essential 7 — Payment in money only
The instrument must require payment in money and money only. An undertaking to pay Rs. 500 "and to deliver to him my black horse on 1st January next" — Illustration (h) to Section 4 — is not a valid promissory note because the obligation is mixed. The payment must be wholly monetary. A promise to deliver goods, services, or shares — even alongside cash — defeats Essential 7.
Bank notes and currency notes are excluded
Section 4 in terms excludes a bank note or a currency note. The Reserve Bank of India's promise to pay the bearer the face value of a currency note is not a Section 4 instrument; the note is itself the legal tender. Section 21 of the Reserve Bank of India Act, 1934 designates RBI notes as legal tender; the NI Act simply reflects this exclusion.
The corollary is Section 31 of the RBI Act, which prohibits any person other than the Reserve Bank or the Central Government from issuing a promissory note payable to bearer. The combined effect is that a promissory note payable to bearer is invalid in India. Only an order promissory note can be issued. This is the single most testable proposition arising out of Section 4 read with the RBI Act.
Intention and the popular-sense test
Beyond the seven statutory essentials, the courts have layered an intention requirement and a popular-sense test. The leading authority is the Rajasthan High Court's full-bench decision in Nanga v. Dhannalal AIR 1962 Raj 68. The document in question — an entry in the creditor's account book reading "this amount is payable on demand. Shall pay this money... with interest whenever he shall demand it" — contained an unconditional undertaking to pay a certain sum to a certain person and was signed by the maker. It nevertheless fell outside Section 4, the court held, because the parties never intended to create a negotiable instrument.
The court drew on its earlier decision in Gordhan Singh v. Suwa Lal AIR 1959 Raj 156, which laid down a layered test: an instrument falls within Section 4 only if (i) the four statutory ingredients are satisfied (unconditional undertaking, certain sum, certain payee, signed maker); and (ii) three further tests are met — (a) the promise to pay must be the substance of the instrument; (b) nothing in the instrument is inconsistent with its character as substantially a promise to pay; and (c) the parties must intend the instrument to be a promissory note. The court in Nanga applied this framework: the maker was an illiterate villager who might never have heard of promissory notes, the document was in the form moneylenders use to keep accounts, and it was contained on a page of an account book where another person's account also appeared. None of these features was consistent with a promissory note in the popular commercial sense; the document was an agreement, not a Section 4 instrument.
The intention-and-popular-sense overlay matters because it explains why exam fact-patterns repeatedly involve account-book entries, hundi-style documents, and informal letters. A document may contain every statutory ingredient and still fail Section 4 if it lacks the commercial form that men of business would recognise as a promissory note.
Receipt-versus-promissory-note distinction
The Privy Council line beginning with Mortgage Insurance Corporation v. Commissioner of Inland Revenue (1888) 21 QBD 352 has held that a document which is primarily a receipt — even if coupled with a promise to pay — is not a promissory note. The reasoning is that receipts and agreements are not generally intended to be negotiable, and the embarrassment to commerce of casting the negotiable net too wide is significant. Where the parties have used stamp paper consistent with a receipt rather than a promissory note, that fact is itself evidence of a different intention.
Specimen and form
A standard specimen reads:
Sixty days after date I promise to pay Mr. X or order the sum of rupees one thousand only.
(Sd/-) A
STAMP
The specimen marks the principal architectural elements: the amount in figures and words, the place and date of execution (not strictly essential but evidentiarily useful), the unconditional undertaking, the named payee with the order endorsement, and the maker's signature on a stamped instrument.
Leading authorities on Section 4
Nanga v. Dhannalal AIR 1962 Raj 68 — the popular-sense and intention test; an account-book entry containing all the statutory ingredients can still fail Section 4 if commercial intention is missing.
Chhabildas Mangaldas v. Luhar Kohan Arja AIR 1967 Guj 7; Jaikumar Shivlal v. Motilal Hirachand Gandhi AIR 1973 Bom 27 — the Section 4 definition is exhaustive; an instrument satisfying the test is a promissory note even if not in fact negotiated.
Bal Mukand v. Munnalal Ramjilal AIR 1970 Punj 516 — "I promise to pay" is not sacramental; the test is whether the instrument indicates a promise.
T. Chettiar v. A. Chettiar AIR 1971 Mad 290; Surjit Singh v. Ram Rattan Sharma AIR 1975 Gau 14 — an acknowledgement of receipt of a sum coupled with an unconditional undertaking to repay is a valid promissory note.
Bachan Singh v. Ram Avadh ILR 1949 All 713 — an implied undertaking inferred from the use of the words "debt" or "pro-note" is not sufficient for Section 4.
Rattan Singh v. Pirbhu (1931) All 302 — a document called a promissory note that merely recites a sum due, with the executant agreeing to pay interest because of inability to pay the principal, contains no unconditional promise and is not a Section 4 instrument.
Distinguish from cognate provisions
Three distinctions are exam-favourites.
Section 4 (NI Act) versus Section 2(22) of the Stamp Act. The Stamp Act definition is wider: it includes a note promising payment of any sum out of any particular fund which may or may not be available, or upon any condition or contingency that may or may not happen. The wider definition operates only for stamp-duty purposes; for the purposes of the Negotiable Instruments Act, only the narrow Section 4 definition matters.
Promissory note versus IOU. An IOU is a mere acknowledgement of debt without a promise to pay; it is not a Section 4 instrument. The presumption of consideration under Section 118 does not attach. The holder may sue on the underlying debt but not on the document as a negotiable instrument.
Promissory note versus bill of exchange (Section 5). A note has two parties (maker and payee); a bill has three (drawer, drawee, payee). A note contains a promise; a bill contains an order. A note requires no acceptance; a bill must be accepted by the drawee to be binding on him. The maker's liability on a note is primary and absolute; the drawer's liability on a bill is secondary and conditional on the acceptor's failure to honour. The full comparison is set out in the chapter on the distinction between promissory note, bill of exchange and cheque.
Liability of the maker
Section 32 of the Act fixes the maker's liability. In the absence of a contract to the contrary, the maker of a promissory note is bound to pay the amount thereof at maturity according to the apparent tenor of the note, and is also liable to compensate any party for any loss or damage sustained by reason of the maker's default. The maker's liability is primary and absolute: he cannot escape it by alleging that the payee did not give notice of dishonour, because notice of dishonour is unnecessary on a promissory note (Section 93). The chapter on the parties to negotiable instruments develops the comparison with the drawer of a bill.
Section 4 in the broader scheme
Section 4 is the foundation for nearly half of the Act. The presumption of consideration under Section 118, the rule on payment in due course under Section 10, the discharge provisions under Sections 78 to 90, and the maturity rules under Sections 22 to 25 — all operate on a Section 4 instrument. The capacity rules in Sections 26 to 32 determine who may make a promissory note. The rights of the holder and holder in due course under Sections 8 and 9 attach only to a Section 4 instrument once it is negotiated. A document that fails Section 4 is not within the Act's machinery; it may still operate as a contract or as evidence of a debt, but the Act's specialised provisions do not reach it.
Frequently asked questions
Are 'I owe you Rs. 1,000' and 'I am liable to pay Rs. 1,000' valid promissory notes?
Neither is. Both are mere acknowledgements of indebtedness; neither contains an express undertaking to pay. Illustration (c) to Section 4 — 'Mr. B, I.O.U. Rs. 1,000' — is the textbook negative example. The Allahabad High Court in Bachan Singh v. Ram Avadh ILR 1949 All 713 held that an implied undertaking inferred merely from the use of words like 'debt' or 'pro-note' is not sufficient. To be a promissory note, the instrument must contain an express promise; the implied undertaking arising from acknowledgement is not enough.
Is a promissory note payable to bearer valid in India?
No. Although the NI Act on its face appears to permit a promissory note payable to bearer, Section 31 of the Reserve Bank of India Act, 1934 prohibits any person other than the Reserve Bank or the Central Government from issuing such a note. The reason is the RBI's monopoly on bearer-on-demand currency: if private parties could issue bearer promissory notes, that monopoly would be defeated. The combined effect is that a bearer promissory note is invalid; only an order promissory note can be issued in India.
Does the absence of the words 'I promise to pay' make the instrument invalid?
No. The Punjab High Court in Bal Mukand v. Munnalal Ramjilal AIR 1970 Punj 516 held that the words 'I promise to pay' are not sacramental. The test is whether the instrument, read as a whole, indicates a promise by the maker to make the payment. Conversely, the use of those words is not enough by itself if the document is otherwise a mere acknowledgement. The court reads the instrument with the surrounding circumstances and the parties' commercial standing to determine whether a promise was intended.
Is a document that satisfies all the statutory ingredients always a promissory note?
Not necessarily. The Rajasthan High Court in Nanga v. Dhannalal AIR 1962 Raj 68 layered an intention-and-popular-sense overlay on the statutory test. A document containing all the Section 4 ingredients — unconditional undertaking, certain sum, certain payee, signed maker — can still fall outside the section if the parties did not intend to create a negotiable instrument in the popular commercial sense. An entry in an account book, even with all the formal ingredients, may fail because the form is one of bookkeeping rather than commerce.
What happens if the rate of interest is not specified?
The High Courts have differed. The Allahabad decision in Official Liquidator v. Bishan Singh 1968 ALL LJ 171 held that a promise to pay a sum 'with interest' without specifying the rate is invalid because the sum is uncertain. The Madras High Court in Seth Tulsidass Lalchand v. Rajagopal (1967) 2 MLJ 66 took the contrary view: the rate of interest could be supplied by Section 80 of the NI Act (which fixes 18 per cent in the absence of a contract), and the instrument is therefore not invalid for uncertainty. The view that prevails depends on the High Court.
Is a promise to pay 15 days after the death of a named person a valid promissory note?
Yes. Section 4, paragraph 2 saves a promise to pay on the happening of an event that, in the ordinary experience of mankind, is certain to occur, even if the time of the event is uncertain. Death is the standard example: the death of a named person is certain, the date is not, but the promise is good. By contrast, a promise to pay 'on the marriage of B with C' is conditional and invalid because the marriage is not certain to happen. The sole question is whether the event is, in the ordinary experience of mankind, certain.