Insurer Used a Vague Clause? Ambiguity Favours You

If your insurer rejected a health, motor, home, or life claim by quoting an exclusion clause that is confusingly worded, you may have a strong case. Under a long-settled rule of Indian contract law called contra proferentem, any genuine ambiguity in policy wording is read against the insurer who drafted it and in favour of you, the policyholder. A vague exclusion is not an automatic ground to deny your claim.

An insurer cannot escape liability by leaning on a vaguely-worded exclusion clause. Exclusion clauses are read strictly and narrowly against the company. If a clause can reasonably be read in two ways, the meaning that protects your claim wins. The burden of proving that an exclusion clearly applies sits with the insurer, not with you.

This means a rejection letter is not the last word. You can challenge it through the insurer's grievance cell, the Insurance Ombudsman, and the consumer forum, pointing to the ambiguity in the very clause the company is relying on.

“Contra proferentem” is Latin for “against the one who offers it”. The insurance company writes the policy. You only sign it. You had no chance to negotiate the fine print. So the law puts the risk of unclear drafting on the drafter.

In plain words:

• The insurer chose every word in the exclusion clause.
• If those words are clear and obviously cover your situation, the exclusion applies.
• But if the words are vague, open to more than one honest reading, or self-contradictory, the court or ombudsman reads them in the way that favours you.
• An exclusion can never quietly cancel out the main thing the policy promised to cover.

A simple test: read the exclusion clause out loud. If two reasonable people could fairly disagree about what it means, that ambiguity is your strongest argument.

On 16 December 2025, the Supreme Court of India delivered Cement Corporation of India Ltd. v. ICICI Lombard General Insurance Co. Ltd., 2025 INSC 1444 (also reported as 2025 LiveLaw (SC) 1215), decided by Justices J.K. Maheshwari and Vijay Bishnoi.

The Court reaffirmed two settled principles:

• An exclusion clause in an insurance policy must be construed strictly.
• Wherever there is ambiguity between two or more clauses in the contract, it must be interpreted in favour of the insured (the contra proferentem rule).

On that basis the Supreme Court set aside the insurer's repudiation of the claim and sent the matter back for a proper assessment of the loss.

Honest framing - read this before you rely on the case. The dispute itself was a business-to-business fire-insurance policy taken by a government corporation, not a retail health or motor policy. So treat this ruling as a fresh, authoritative restatement of the general contra proferentem principle, not as a brand-new universal right invented in 2025. The principle it applies is decades old and applies across insurance contracts; the specific fire-policy points in the judgment (for example, arguments about the cause of ignition) are tied to that fire dispute and should not be assumed to be a blanket rule for every policy type.

You do not need to be a corporation to use contra proferentem. A retail policyholder with a health, motor, home, or term-life policy can rely on the same principle whenever an insurer rejects a claim using a clause that is genuinely unclear.

What helps your case:

• The exclusion clause uses undefined or fuzzy words (for example “pre-existing”, “consequential”, “deliberate”, “unforeseen”) without a clear definition in the policy.
• The same policy has two clauses that pull in opposite directions.
• The insurer is reading the exclusion so widely that it almost cancels the cover you paid for.
• The clause was not clearly explained to you when the policy was sold.

What does not help:

• A clause that is plainly worded and obviously covers your situation. Contra proferentem only bites where there is real ambiguity, not where you simply dislike a clear exclusion.

1. Get the rejection in writing. Ask the insurer for the exact clause number and the precise reason for repudiation. A verbal “no” is not enough.
2. Read the policy wording yourself. Find the exact exclusion clause and the definitions section. Highlight every word that is vague, undefined, or contradicted elsewhere.
3. Write to the insurer's Grievance Redressal Officer (GRO). State plainly that the clause is ambiguous and must be read in your favour under the contra proferentem rule. Attach the policy, the claim, and the rejection letter. Insurers must respond, typically within about 15 days.
4. Escalate to the IRDAI grievance route if the GRO does not resolve it. You can register a complaint through the IRDAI Bima Bharosa grievance portal.
5. Approach the Insurance Ombudsman. This is a free, citizen-friendly forum for personal-line policies (health, motor, home, life) up to the prescribed monetary limit. The Ombudsman can examine clause ambiguity and direct payment.
6. File before the Consumer Commission (District, State, or National, depending on the claim value) for deficiency in service if the rejection is unfair. Quote the contra proferentem principle and the 2025 Supreme Court ruling.

For a deeper walk-through of each forum, see how to complain to IRDAI when a health claim is rejected and the life-insurance Ombudsman process.

Dr. Shrawan Kumar Pathak, a retired professor in Patna, bought a home-insurance policy that covered “damage by fire and allied perils”. A short circuit caused a fire that gutted his study. The insurer rejected the claim, pointing to an exclusion for “loss arising out of negligence” and arguing the old wiring made the loss “self-inflicted”.

Dr. Pathak read the clause closely. “Negligence” was nowhere defined in the policy, and another clause clearly promised cover for accidental fire. He wrote to the Grievance Redressal Officer, argued that the undefined word “negligence” was ambiguous and must be read in his favour, and that the exclusion could not quietly cancel the fire cover he had paid for. When the insurer stalled, he took it to the Insurance Ombudsman, citing the contra proferentem principle. The Ombudsman agreed the wording was ambiguous and directed the insurer to assess and pay the loss.

The lesson: he did not argue about the facts of the fire. He argued about the words of the clause - and the ambiguity worked in his favour.

Contra proferentem sits next to another protection: an insurer also cannot reject a claim by relying on a condition that was impossible to satisfy. If your rejection turns on a condition you could never realistically have met, read why an insurer cannot reject a claim on an impossible condition alongside this guide.

Not sure which regulator handles your complaint? The regulator hub for SEBI, RBI, IRDAI, TRAI and DGCA points you to the right door.

For a complete toolkit on using your rights and filing the right paperwork, see The RTI Playbook.

It is a rule of interpretation. Because the insurer drafts the policy, any genuine ambiguity in the wording is read against the insurer and in favour of the policyholder. It applies most strongly to exclusion clauses, which are construed strictly and narrowly.

No. Cement Corporation of India Ltd. v. ICICI Lombard, 2025 INSC 1444, reaffirms a long-settled principle rather than creating a new one. It is useful because it is a fresh, authoritative Supreme Court statement that ambiguous exclusion clauses must be read in favour of the insured.

You can rely on the general contra proferentem principle it restates, which applies across insurance contracts. But the fire-specific points in that judgment are tied to the fire dispute. Argue the ambiguity in your own policy wording rather than copying the fire facts.

The insurer. If a company wants to deny your claim using an exclusion clause, it must show that the clause clearly and unambiguously covers your situation. If it cannot, the ambiguity is read in your favour.

Then contra proferentem does not help you, because there is no ambiguity to resolve. The rule only applies where the wording is genuinely open to more than one honest reading. A clear, well-defined exclusion will usually stand.

Start with the insurer's Grievance Redressal Officer in writing. If that fails, escalate to the IRDAI Bima Bharosa portal, then the Insurance Ombudsman, and finally the Consumer Commission. Each step is described in the process section above.

Yes. The Insurance Ombudsman is a free forum for personal-line policies such as health, motor, home, and life, up to the prescribed monetary limit. You do not need a lawyer to file.

• Cement Corporation of India Ltd. v. ICICI Lombard General Insurance Co. Ltd., 2025 INSC 1444 (also 2025 LiveLaw (SC) 1215), Supreme Court of India, decided 16 December 2025 (Maheshwari and Bishnoi, JJ.) - full judgment on Indian Kanoon.
• Insurance Regulatory and Development Authority of India (IRDAI), Bima Bharosa grievance portal and the Insurance Ombudsman scheme.

• Insurer cannot reject a claim on an impossible condition
• Health insurance claim rejected: the IRDAI complaint route
• Life insurance claim rejected: the Ombudsman process
• Which regulator to complain to: SEBI, RBI, IRDAI, TRAI, DGCA