Estoppel vs Waiver under the Bharatiya Sakshya Adhiniyam, 2023

Both doctrines prevent a party from asserting something, and pleadings routinely run them together as though they were interchangeable. They are not. Estoppel looks at what the other side did in reliance; waiver looks at what the party himself gave up. One is a rule of evidence that requires a representation acted upon; the other is a contractual idea that requires knowledge of a right and an intention to abandon it. A plea framed as one when the facts support the other will fail on its own terms.

1. The Two Doctrines

Waiver has no section in the Adhiniyam. It is a doctrine of the general law with its statutory expression in the contract law — principally in the provision permitting a promisee to dispense with or remit, wholly or in part, the performance of a promise made to him, or to extend the time for performance, or to accept any satisfaction instead of it.

The classical definition is that waiver is the intentional relinquishment of a known right, or conduct that warrants an inference of such relinquishment.

2. The Core Distinction

3. The Classical Statement

Two consequences flow from the characterisation of waiver as contractual, and both are practical.

Authority matters. A waiver made by an agent binds the principal only if the agent had authority to make it. An estoppel, by contrast, may arise from conduct the party never authorised anybody to engage in, provided he permitted the belief to be formed.

Consideration may be in issue. Because waiver is treated as contractual, the question whether something was given for it may arise — though the contract law expressly permits a promisee to dispense with or remit performance without consideration, which removes the difficulty in most cases of a waiver of contractual rights.

4. Knowledge — The Element That Decides Most Cases

Waiver requires knowledge of the right waived. This is its most demanding element and it defeats a great many pleas.

A person cannot intentionally relinquish a right he does not know he has. Where a party acted in ignorance of a right — because he did not know the facts giving rise to it, or did not appreciate its legal existence — his conduct is not a waiver however clearly it looks like acquiescence in the outcome.

Estoppel carries no corresponding requirement. A person may be estopped by a representation he believed to be true, and indeed the classical case is precisely that: the illustration to Section 121 concerns a man who told a purchaser the land was his and who afterwards acquired the title, and he is estopped notwithstanding that the representation was false when made.

5. Waiver of Statutory Rights

The most litigated question about waiver is whether a right conferred by statute may be given up, and the answer turns on whom the statute was enacted to protect.

The test produces a workable division.

6. How Each Is Established

The material required differs completely, and pleadings should be drawn accordingly.

6.1 Proving an estoppel

1. The representation — the declaration, act or omission relied upon, identified specifically.
2. That it was as to an existing fact, not a promise as to future conduct.
3. That the maker intended it to be acted upon, or so conducted himself that a reasonable person would act on it.
4. That the other party believed it and acted upon that belief.
5. That he altered his position to his detriment.

6.2 Proving a waiver

1. The right said to have been waived, identified precisely.
2. That the party had knowledge of that right at the material time. This is the element most often unproved.
3. That he intended to abandon it, either expressly or by conduct from which the intention is to be inferred.
4. That the right was one capable of being waived — that it was not founded on public policy.
5. Where waiver is set up as an agreement, the agreement and, where required, what was given for it — Krishna Bahadur.

Notice what is absent from the second list: there is nothing about what the other party believed, nothing about reliance, and nothing about detriment. A waiver is complete without them.

7. Where They Overlap

The doctrines are distinct but the same facts frequently attract both, and it is worth seeing when.

A party with a known right conducts himself as though he had none, and the other alters his position. Here both are available: waiver, because a known right was relinquished; estoppel, because a representation by conduct was relied upon. Both should be pleaded, since either may fail for want of one of its own ingredients.

A landlord accepts rent after a forfeiture. The acceptance may be a waiver of the forfeiture — a known right not insisted upon — and may also estop the landlord from asserting that the tenancy ended, if the tenant remained in possession on the faith of it.

A contracting party accepts defective performance without objection. This may waive the right to reject, and may estop him from asserting the breach where the other proceeded in reliance.

The practical point is that waiver and estoppel are not alternatives in pleading. Where the facts support both, both should be pleaded, and the party should be ready to prove the distinct ingredients of each rather than treating them as one plea with two names.

8. Distinguishing Both from Acquiescence

A third doctrine sits close to these two and is examined separately, but the three-way comparison is worth having here.

9. Practical Points

1. Plead them separately, with the ingredients of each set out. A composite plea of 'waiver, estoppel and acquiescence' invites the objection that no case has been pleaded at all.
2. For waiver, prove knowledge of the right. This is where the plea most often fails, and it is a matter of evidence rather than inference.
3. For estoppel, prove reliance and alteration of position. These are facts, and asserting them is not proving them.
4. Identify the statutory character of any right said to be waived. If it was enacted in the public interest, the plea fails whatever the party intended.
5. Where waiver is set up as an agreement, plead the agreement and what was given for it.
6. Where both are available, plead both, since the ingredients are different and either may fail independently.
7. Remember that waiver may found a cause of action while estoppel ordinarily may not.

10. The Position Stated Shortly

1. Estoppel asks what the other side did; waiver asks what this side meant.
2. Estoppel is a rule of evidence in Section 121; waiver is contractual and has no section in the Adhiniyam — Dawsons Bank and Krishna Bahadur.
3. Waiver requires knowledge of the right and an intention to abandon it; estoppel requires neither.
4. Estoppel requires reliance and alteration of position; waiver requires neither.
5. Waiver may found a cause of action; estoppel is ordinarily a shield only.
6. A statutory right enacted for an individual's benefit may be waived; one founded on public policy may not — Waman Shriniwas Kini.
7. The limits on both rest on the same principle — parties cannot displace what the legislature enacted for the general good.
8. Where both are available, plead both, and prove the distinct ingredients of each.

11. Related Topics and Provisions