Ab Initio / Ab Initio /

Ab initio is a Latin legal phrase meaning 'from the very beginning.' In Indian law it describes acts, contracts, orders, and statutes that are treated as having never possessed any legal existence from the moment of their creation — not merely cancelled going forward but wholly null from inception. The phrase is encountered in virtually every field of Indian law: constitutional validity of legislation, contracts formed without legal capacity, and administrative orders made without jurisdiction all turn on whether the impugned act is void ab initio or merely voidable.

The concept entered Indian law through English common law and equity, which drew from the Roman maxim quod initio vitiosum est non potest tractu temporis convalescere — what is void from the beginning cannot become valid with the passage of time. When an act is void ab initio, no legal rights or obligations arise from it, no court can enforce it, no limitation period runs in its favour, and no party can ratify it to give it retrospective validity. This stands in direct contrast to a voidable act, which subsists and binds the parties until the aggrieved person elects to avoid it.

In constitutional law the consequences are far-reaching. The Supreme Court has consistently held that legislation violating fundamental rights under Part III, or falling outside the legislative competence of the enacting legislature under the Seventh Schedule, is void ab initio — a nullity from its date of enactment. In theory, all actions taken under such legislation are also void; in practice, courts apply doctrines of prospective overruling and the de facto officer rule to prevent systemic disruption.

In administrative law, orders issued by an authority lacking jurisdiction or in flagrant breach of natural justice are void ab initio and may be challenged in collateral proceedings without filing a regular appeal. Courts distinguish between mere procedural irregularity — which vitiates only if prejudicial — and a fundamental jurisdictional defect that makes the order null from the start regardless of prejudice.

The critical distinction for practitioners is between void and voidable. A void act is ab initio null: no party can rely on it, no rights can be acquired under it even by an innocent third party, and it cannot be made valid by consent or conduct. A voidable act subsists until avoided. Misidentifying a voidable transaction as void leads to wrong advice on limitation, on title passing to purchasers, and on whether affirmative steps are required to challenge the act.