Justice K.S. Puttaswamy (Aadhaar) Judgment

The Justice K.S. Puttaswamy (Aadhaar) Judgment refers to the Supreme Court of India's decision delivered on 26 September 2018 in Justice K.S. Puttaswamy (Retd.) and Anr. v. Union of India and Ors. (Writ Petition (Civil) No. 494 of 2012), which tested the constitutional validity of the Aadhaar (Targeted Delivery of Financial and Other Subsidies, Benefits and Services) Act, 2016. The litigation began as a challenge by Justice K.S. Puttaswamy, a retired judge of the Karnataka High Court, who contended that the Aadhaar biometric identification scheme—administered by the Unique Identification Authority of India (UIDAI)—lacked statutory backing and violated fundamental rights. The matter is procedurally and conceptually distinct from the 2017 nine-judge ruling that emerged from the same petition and which established privacy as a fundamental right. The 2018 verdict, delivered by a five-judge Constitution Bench, applied that privacy doctrine to the operational architecture of Aadhaar itself, anchoring its analysis in Articles 14, 19 and 21 of the Constitution.

The Bench comprised Chief Justice Dipak Misra and Justices A.K. Sikri, A.M. Khanwilkar, D.Y. Chandrachud and Ashok Bhushan. Justice Sikri authored the majority opinion (joined by the Chief Justice and Justice Khanwilkar), Justice Bhushan wrote a separate concurrence, and Justice Chandrachud delivered a lone dissent. The core analytical tool was the proportionality test articulated in the 2017 privacy judgment, which requires that any state intrusion into privacy satisfy four conditions: a legitimate aim, a rational nexus between the measure and the aim, necessity (no less-restrictive alternative), and a balance between the extent of intrusion and the public interest served. The majority held that Aadhaar, by ensuring targeted delivery of welfare under Article 7 of the Act, served the legitimate state interest of preventing leakages and was therefore proportionate for that purpose.

A second pivotal procedural question concerned whether the Aadhaar Act had been validly enacted as a Money Bill under Article 110 of the Constitution, a classification that bypasses the Rajya Sabha. The majority upheld the Money Bill route, reasoning that the Act's core provision (Section 7, linking Aadhaar to subsidies drawn from the Consolidated Fund of India) brought it within Article 110. Justice Chandrachud dissented sharply, characterising the certification as a "fraud on the Constitution" because the Act contained substantive non-fiscal provisions. The Bench also addressed data security, mandating limits on retention, prohibiting metadata storage beyond authentication, and reading down provisions to bar disclosure on national-security grounds without judicial oversight.

The most consequential operational outcome was the striking down of Section 57 of the Aadhaar Act, which had permitted private entities—telecom operators, banks acting commercially, and app-based services—to demand Aadhaar authentication. The Court held this clause unconstitutional, ending the compulsory linking of Aadhaar to mobile SIM cards (following Department of Telecommunications circulars) and to private bank accounts (under amended Prevention of Money-laundering Rules). The Court simultaneously affirmed the mandatory linkage of Aadhaar with the Permanent Account Number (PAN) under Section 139AA of the Income Tax Act, 1961, and upheld its use for filing returns, while making linkage to welfare schemes permissible but reading down Section 33(2) on national-security disclosure.

The judgment must be distinguished from the 2017 Puttaswamy (Privacy) verdict, which was a nine-judge bench that unanimously declared the right to privacy intrinsic to Article 21 and overruled the contrary precedents in M.P. Sharma (1954) and Kharak Singh (1962). The 2017 ruling established the principle; the 2018 ruling applied it. Practitioners also distinguish the Aadhaar judgment from the broader doctrine of informational self-determination and from the data-protection regime later codified in the Digital Personal Data Protection Act, 2023. The proportionality framework deployed here is the same standard applied in subsequent rights litigation, including the 2023 Anuradha Bhasin internet-shutdown jurisprudence and challenges to surveillance.

Controversy has persisted on several fronts. The Money Bill certification was referred to a seven-judge bench in Rojer Mathew v. South Indian Bank (2019), which questioned the 2018 majority's reasoning and left the issue open—a referral that remains undecided, casting a shadow over Aadhaar's enactment validity. Section 57's invalidation prompted Parliament to pass the Aadhaar and Other Laws (Amendment) Act, 2019, reintroducing voluntary authentication by private entities with an opt-in framework and an appointed adjudicating mechanism, an arrangement critics argue partly resurrects what the Court struck down. The exclusion errors documented in welfare delivery—biometric authentication failures denying rations to manual labourers and the elderly—continue to fuel litigation about the practical proportionality the majority presumed.

For the working practitioner, the Aadhaar Judgment is foundational reading across multiple domains. For the civil servant designing welfare delivery, it defines the legal boundary between permissible subsidy-linked authentication and impermissible coercion in private transactions. For the policy researcher, it operationalises the proportionality test as the governing standard for any data-driven state programme, a benchmark now invoked in debates over facial recognition, the Criminal Procedure (Identification) Act, 2022, and central data repositories. For UPSC General Studies Paper II candidates, it is a touchstone for questions on fundamental rights, the welfare state, and the separation-of-powers tension exposed by Money Bill misuse. The judgment endures as the case where the Indian judiciary attempted to reconcile a vast digital identity infrastructure with constitutional limits—an exercise that defines the contours of the surveillance-and-welfare debate worldwide.