Paying the correct duty is only half the battle. The Kerala Stamp Act, 1959 insists that the duty be paid in the prescribed form and applied in the prescribed manner - the right kind of stamp, properly affixed, properly cancelled, and used on its own paper. Sections 11 to 16, grouped under "of the time of stamping instruments" and "of stamps and the mode of using them", govern this mechanical but litigation-heavy dimension. A document on which full duty has actually been paid can still be "deemed to be unstamped" if an adhesive stamp is left uncancelled, if the impressed stamp does not appear on the face of the instrument, or if a second instrument is squeezed onto the same stamped paper. This article maps the mode-of-stamping regime, its consequences, and the case law that softens or sharpens its edges.
Two distinct questions: how much, and how
The stamp law asks two separate questions of every chargeable instrument. The first - how much duty is payable - is answered by the charging provisions and the Schedule, discussed in liability of instruments to stamp duty and the Article-wise Schedule. The second - how that duty is to be applied - is the subject of the mode-of-stamping provisions, Sections 11 to 16 of the Kerala Stamp Act, 1959. These mirror Sections 11 to 16 of the Indian Stamp Act, 1899, and are construed in pari materia with the central enactment, so that Supreme Court authority on the 1899 Act applies with full force in Kerala.
The distinction matters because compliance with the first question does not cure default in the second. An instrument carrying stamps of the full value can still be treated as unstamped if those stamps are of the wrong description, are not cancelled, or are not borne on the proper paper. The mode-of-stamping rules are thus not mere formality; they are conditions of validity. See the companion note on the Kerala Stamp Act hub for the scheme as a whole.
The two species of stamp: impressed and adhesive
Section 2 of the Act recognises two basic species of stamp. An impressed stamp is one engraved, embossed or printed onto the stamp paper itself (the familiar non-judicial stamp paper, or franking), so that the instrument is written upon the very paper that carries the duty. An adhesive stamp is a separate label - a revenue or special adhesive stamp - affixed to ordinary paper on which the instrument is written. Each mode has its own rules of use because each carries its own risk of abuse: an impressed stamp invites reuse of the paper for a second document, while an adhesive stamp invites reuse of the label by peeling it off.
The Act's design is to channel each class of instrument to the appropriate species of stamp. Section 11 lists the limited categories of instrument that may be stamped with adhesive stamps - typically low-value or specially notified instruments such as bills of exchange, receipts, transfers of shares, notarial acts and the like - leaving the general run of conveyances, settlements and mortgages, defined in definitions of instrument, conveyance and settlement, to be executed on impressed stamp paper. Using the wrong species, even if the value is correct, can attract the "deemed unstamped" consequence.
Section 11: use of adhesive stamps
Section 11 provides the enabling rule for adhesive stamps. It permits specified instruments - and only those - to be stamped with adhesive stamps, and authorises the Government to notify which adhesive stamps may be used for which instruments. The provision is permissive in form but restrictive in effect: an instrument that does not fall within an enumerated or notified category cannot validly be stamped with an adhesive stamp at all, and an adhesive stamp affixed to such an instrument is no answer to the charge of duty. The provision must always be read with Section 12, because the right to use an adhesive stamp under Section 11 is conditioned on the duty to cancel it under Section 12.
The classic adhesive-stamp instruments under the Kerala regime include receipts, bills of exchange payable otherwise than on demand, share transfers and certain agreements, while franking or impressed paper is the norm for high-value title documents. The policy is administrative convenience for small or routine transactions balanced against revenue protection for substantial ones.
Section 12: cancellation of adhesive stamps
Section 12 is the most litigated of the mode-of-stamping provisions. Sub-section (1) imposes a double obligation: the person who affixes an adhesive stamp to a chargeable instrument must cancel it at the time of affixing, and the person who executes the instrument must cancel any adhesive stamp on it at the time of execution, unless it has already been cancelled. Sub-section (2) supplies the sanction - any instrument bearing an adhesive stamp "which has not been cancelled so that it cannot be used again shall, so far as such stamp is concerned, be deemed to be unstamped." Sub-section (3) explains the manner of cancellation: by writing on or across the stamp one's name or initials, or the name or initials of one's firm, with the true date, or in any other effectual manner.
The whole object is to prevent reuse of the stamp. The test is functional, not formal: the cancellation must be such that the stamp "cannot be used again." A faint pencil tick that could be erased fails; a signature or initials in ink across the stamp suffices. Crucially, the deeming of "unstamped" operates only "so far as such stamp is concerned," so where part of the duty is on a properly cancelled impressed stamp and only an additional adhesive stamp is uncancelled, only that portion is treated as missing - the instrument is then under-stamped rather than wholly unstamped, and may be saved on payment of the deficit and penalty.
Section 13: how instruments on impressed stamps must be written
Section 13 governs the use of impressed stamps. Every instrument written on impressed stamp paper must be written so that the stamp appears on the face of the instrument and cannot be used for or applied to any other instrument. The rule prevents the device of writing the instrument on a blank sheet and reserving the stamped sheet, or of writing the operative text away from the stamp so that the stamped portion remains reusable. The stamp must be integral to, and consumed by, the very document for which duty is paid.
The provision also underlies the now-settled point that the age of the stamp paper is irrelevant to validity, provided the stamp is genuine and consumed by the instrument. In Thiruvengada Pillai v. Navaneethammal, (2008) 4 SCC 530, the Supreme Court held that the Indian Stamp Act prescribes no period of validity for a stamp paper; the six-month period in the refund provision (Section 54 of the central Act) governs only the right to claim a refund of an unused stamp, not the usability of the paper. An agreement written on stamp papers purchased years earlier was therefore not invalid for that reason, though the antiquity of the paper could be a circumstance casting doubt on the document's genuineness on the facts.
Section 14: only one instrument on the same stamp
Section 14 forbids writing a second chargeable instrument upon a piece of stamped paper on which a chargeable instrument has already been written. The rationale follows directly from Section 13: one stamp, one instrument, one payment of duty. To allow two instruments on one stamp would let a single payment of duty discharge the liability of two distinct transactions, defeating the fiscal purpose of the Act.
The section carries an important proviso. It does not prevent an endorsement on an already-stamped instrument, provided the endorsement is itself duly stamped or is not chargeable with duty, where the endorsement is made to transfer a right created or evidenced by the instrument, or to acknowledge receipt of money or goods whose payment or delivery is secured by it. Thus a duly stamped endorsement transferring a bill, or a non-chargeable receipt endorsed on a bond, is permissible; what is barred is writing an independent second instrument that ought to bear its own duty.
Section 15: instruments written contrary to Sections 13 and 14
Section 15 supplies the consequence for breach of the impressed-stamp rules. Every instrument written in contravention of Section 13 or Section 14 "shall be deemed to be unstamped." This is a stronger sanction than the partial deeming in Section 12(2): where the rules on impressed stamps are flouted, the entire instrument is treated as unstamped, not merely the offending stamp. An instrument written so that the impressed stamp does not appear on its face, or a second instrument written on already-used stamp paper, is in the eye of the stamp law a wholly unstamped document.
The phrase "deemed to be unstamped" is the gateway to the impounding and admissibility machinery. Once an instrument is deemed unstamped, it attracts Section 33 (impounding) and Section 34 (inadmissibility in evidence unless duty and penalty are paid) of the Kerala Act - the procedural consequences examined in detail in liability of instruments to stamp duty. Mode-of-stamping defaults thus feed directly into the evidentiary disabilities of the unstamped instrument.
Section 16: denoting duty
Section 16 addresses the situation where the duty on one instrument, or its exemption from duty, depends on the duty actually paid on another instrument. In such cases the payment of the duty on the first instrument is to be denoted on the second by an endorsement under the hand of the Collector, on written application and production of both instruments, or by the registering officer on production of both. The mechanism prevents double payment where a transaction is documented in connected instruments and the law charges full duty on the principal instrument while charging the ancillary one only with a nominal duty or none at all.
Denoting is the practical bridge between the "how much" and "how" questions in linked-instrument cases. It records on the face of the dependent instrument that the requisite duty has already been borne elsewhere, so that the dependent instrument is not separately exposed to the deemed-unstamped consequence. This dovetails with the rules on principal and ancillary instruments discussed under stamp duty on specific instruments.
The unifying consequence: "deemed to be unstamped"
Sections 12, 14 (read with 15) and 13 (read with 15) all converge on a single legal consequence - the instrument, wholly or in part, is "deemed to be unstamped." This is the conceptual hinge of the mode-of-stamping regime. Being deemed unstamped does not make the instrument void as a matter of contract; it triggers the fiscal and evidentiary machinery. In Hindustan Steel Ltd. v. Dilip Construction Co., (1969) 1 SCC 597 : AIR 1969 SC 1238, the Supreme Court held that the Stamp Act is a fiscal measure enacted to secure revenue for the State, and is "not enacted to arm a litigant with a weapon of technicality" - so that once the duty and penalty are paid, the instrument becomes admissible and may be acted upon as if it had always been duly stamped.
That conciliatory approach was reaffirmed by the seven-Judge Bench in In Re: Interplay between Arbitration Agreements under the Arbitration and Conciliation Act, 1996 and the Indian Stamp Act, 1899 (2023), which held that non-stamping or insufficient stamping is a curable defect that renders an instrument inadmissible but not void; it overruled the contrary view that an unstamped agreement is non-existent in law. The mode-of-stamping defaults are therefore curable: the document is held in suspension, not destroyed.
Curing mode-of-stamping defects
Because the defect is curable, the practical question is how to revive a mis-stamped instrument. Where an adhesive stamp was left uncancelled under Section 12, or an instrument is deemed unstamped under Section 15, the route is through the impounding and validation machinery - production before the Collector, payment of the deficient duty and the prescribed penalty, and endorsement of the instrument as duly stamped. Once validated, the instrument is admissible in evidence and may be registered and acted upon. The point in time at which duty must originally have been paid - before or at execution - is governed by the time-of-stamping rules in time of stamping, and a defect in mode is conceptually distinct from a defect in time.
The earlier, harsher line in Garware Wall Ropes Ltd. v. Coastal Marine Constructions & Engineering Ltd., (2019) 9 SCC 209 - that an unstamped instrument has no existence in law until validated - has now been overtaken on the existence question by the 2023 seven-Judge ruling, though Garware remains instructive on the mandatory duty of a court or authority to impound and not act upon a deficiently stamped instrument until the duty is paid. The settled position is thus a two-step one: the authority must first impound and require payment, after which the cured instrument operates fully.
Practical takeaways for drafting and examination
For the draftsman, the mode-of-stamping rules translate into a short checklist: use the correct species of stamp for the instrument (impressed for the general run, adhesive only where Section 11 permits); cancel every adhesive stamp at execution in ink and with the true date so it cannot be reused; ensure the impressed stamp appears on the face of the instrument and is consumed by it; never write a second chargeable instrument on already-used stamp paper; and obtain a denoting endorsement under Section 16 wherever the duty depends on duty paid on a connected instrument.
For the examinee, the load-bearing propositions are these: correct value does not cure incorrect mode; Section 12(2) deems only the uncancelled stamp unstamped, whereas Section 15 deems the whole instrument unstamped; cancellation is judged by whether the stamp can be reused; stamp paper has no expiry (Thiruvengada Pillai); and the deemed-unstamped status is a curable fiscal disability, not nullity (Hindustan Steel; In Re Interplay). Mode of stamping sits between liability and the Schedule on the one hand, and time of stamping and admissibility on the other - master the bridges and the subject coheres.
Frequently asked questions
What is the difference between an impressed stamp and an adhesive stamp?
An impressed stamp is engraved, embossed or printed onto the stamp paper itself, so the instrument is written on the very paper that carries the duty; an adhesive stamp is a separate revenue or special adhesive label affixed to ordinary paper. Section 11 permits adhesive stamps only for specified instruments, while the general run of conveyances, mortgages and settlements must be on impressed paper.
What happens if an adhesive stamp is not cancelled?
Under Section 12(2) of the Kerala Stamp Act, 1959, an instrument bearing an adhesive stamp that has not been cancelled so that it cannot be used again is, so far as that stamp is concerned, deemed to be unstamped. The cancellation must be effectual - typically a signature or initials in ink with the true date written across the stamp - and the test is whether the stamp could be reused.
Does Section 15 deem the whole instrument unstamped or only part of it?
Section 15 deems the entire instrument unstamped where it is written in contravention of Section 13 (impressed stamp must appear on the face) or Section 14 (only one instrument per stamp). This is harsher than Section 12(2), which deems only the uncancelled adhesive stamp unstamped and can leave the instrument merely under-stamped rather than wholly unstamped.
Is an old stamp paper invalid for stamping an instrument?
No. In Thiruvengada Pillai v. Navaneethammal, (2008) 4 SCC 530, the Supreme Court held that the stamp law prescribes no period of validity for stamp paper. The six-month period in the refund provision concerns only the right to a refund of an unused stamp, not the usability of the paper, so an instrument written on years-old stamp paper is not invalid merely on that account, though antiquity may bear on the document's genuineness.
Can two instruments be written on the same stamp paper?
No. Section 14 forbids writing a second chargeable instrument on stamp paper on which a chargeable instrument has already been written, so that one payment of duty cannot discharge two transactions. A duly stamped or non-chargeable endorsement made to transfer a right under the instrument, or to acknowledge receipt of money or goods secured by it, is however permitted by the proviso.
Is a mode-of-stamping defect fatal to the instrument?
No - it is a curable fiscal disability, not a nullity. In Hindustan Steel Ltd. v. Dilip Construction Co., (1969) 1 SCC 597, and again in the seven-Judge ruling In Re: Interplay (2023), the courts held that a deemed-unstamped instrument is inadmissible but not void; on impounding and payment of the deficient duty and penalty it becomes admissible and may be acted upon as if duly stamped.