Appeal is filed by person not party to suit. Is it maintainable?

The General Rule: Who Can Appeal

Section 96 of the Code of Civil Procedure, which governs appeals from original decrees, does not enumerate who may prefer an appeal. However, a long and settled line of decisions has established the foundational principle: only a person who is aggrieved by the decree is entitled to file an appeal. Unless a person is prejudicially or adversely affected by the decree, she has no right to appeal at all. A party who succeeds on her own contentions cannot challenge the very relief granted to her. This is the threshold condition that any would-be appellant must cross before the court even examines the appeal on merit.

The Non-Party Appellant: The Exception and Its Conditions

The more nuanced question arises when the appellant was not formally a party to the proceedings in the court below. Here, the settled rule is as follows: no person who is not a party to a suit is entitled as of right to appeal under Section 96. However, such a person may prefer an appeal with the leave of the appellate court, provided she can show that she is bound by the decree, aggrieved by it, or prejudicially affected by it. This is not a liberal door thrown open to any stranger; it is a controlled exception, sparingly exercised.

The expression "aggrieved" has been understood in a precise sense. A person is said to be aggrieved by an order if that order directly affects or prejudices her interest — not merely commercially or remotely, but legally and substantially. A third party who establishes a genuine interest in the welfare of a trust, for instance, would be an aggrieved party with locus standi to prefer an appeal against a decree concerning the trust. The court looks to whether the decree has impacted the legal rights, title, or position of the would-be appellant, and not whether she has a generalised grievance or sympathy with one of the parties.

The Requirement of Leave

The insistence on leave of the appellate court before a non-party can be heard in appeal is not a technicality — it is a substantive safeguard. The appellate court must be satisfied, before granting leave, that the applicant is genuinely prejudicially affected by the decree and has a real interest in challenging it. Without that leave, the appeal filed by a non-party is simply not maintainable. The court does not proceed to hear it on the merits; it is to be dismissed at the threshold for want of locus standi.

Judicial opinion has consistently recognised that permitting non-parties to appeal without leave would open the door to endless meddling by persons with no real stake in the matter. The controlled exception — that leave must be sought and granted — strikes the appropriate balance: it preserves access to justice for genuinely affected outsiders while protecting the integrity and finality of decrees from collateral attacks by parties who have no business intervening.

Persons Who May Appeal Despite Not Being Original Parties

The category of persons who may appeal without having been original parties to the suit — and who may do so without leave in certain situations — is carefully defined. A transferee of the interest of an original party is bound by the decree to the extent of that interest and may appeal, provided the transferee's name has been entered on the record of the suit. The legal representative of a deceased party steps into the shoes of that party under Section 146 and may naturally carry forward or resist an appeal. An auction purchaser who seeks to protect her purchase against an order setting it aside in execution is another recognised example, though in her case the position is governed separately by the provisions relating to execution.

Importantly, in a suit concerning a decree against candidates likely to be affected by relaxation norms, the Supreme Court held that failure to properly implead those affected parties rendered the appeal unmaintainable — a recognition that the rights of persons not before the court must be protected not only by allowing them to intervene but also by insisting that the party seeking a decree against them must bring them in.

The Doctrine of Res Judicata and the Non-Party

There is another dimension to this question that deserves attention. When a non-party is given leave to appeal and the appeal is heard and decided on the merits, the decision in that appeal will be binding on her by way of res judicata, just as it would be on an original party. The grant of leave and the hearing of the appeal make her, for all practical purposes, a party to the appellate proceedings. This is precisely why the courts insist on genuine interest as a precondition — because the consequence of being heard is that the decree binds one.

The Connecting Principle

The underlying principle is elegant in its simplicity: a decree should not adversely affect the rights of a person unless that person has had the opportunity to be heard. The mirror image of this principle is equally sound: a person who has not been heard and has not been adversely affected has no standing to question the decree at all. The right to appeal as a non-party is therefore granted in the service of the first proposition — to remedy the injustice of a decree that adversely binds a person who had no voice — and not as a general invitation to strangers to agitate matters that do not truly concern them.