The amparo (injunction) is an expedited judicial action designed to protect constitutional rights and guarantees against acts or omissions — by the State or private parties — that violate them with manifest arbitrariness or illegality. It is enshrined in Article 43 of the National Constitution since the 1994 reform and governed at the federal level by Law 16,986, as well as specific provincial legislation.
It is an exceptional tool, not a substitute for ordinary proceedings: it requires urgency, manifest illegitimacy, and the absence of another suitable remedy. But when those conditions are met, it offers an abbreviated procedural pathway to obtain effective judicial protection within short timeframes. Constitutional doctrine and case law have extended its application to healthcare, the environment, consumer rights, freedom of expression, personal data (habeas data), and the right to information (Law 27,275).
The most traditional form: it protects the subjective rights of the claimant. It lies against acts or omissions of the State or private parties. Deadline: fifteen business days from the act or omission (exceptions may apply).
Protects rights of collective impact: environment, consumers, supra-individual interests. Broad standing: the affected party, the public ombudsman, registered associations. The Halabi doctrine (Supreme Court, 2009) established the foundations of collective amparo in matters of homogeneous patrimonial claims.
When the administration fails to issue a decision within the applicable deadlines, the private party may petition the court to order the agency to act (Article 28 of the Administrative Procedure Law). It does not resolve the merits but breaks the administrative silence.
A specific variant to access, rectify, or delete personal data held in databases. Governed by Law 25,326 and related regulations.
For an amparo to succeed, the following must be established: manifest arbitrariness or illegality of the challenged act or omission (mere legal disagreement is insufficient); current or imminent violation of a constitutional right; absence of another suitable judicial remedy (not necessarily a faster one, but one capable of providing effective relief); and urgency.
Case law has established that "manifest illegitimacy" does not mean the legal debate is simple, but rather that the constitutional grievance is evident. The adequacy of the ordinary judicial route is assessed case by case: when that route involves a lengthy process during which the harm would be consummated, the amparo is the appropriate remedy.
In our practice, typical amparo actions include: challenging denials by the DNM (National Directorate of Migration) in immigration matters (Article 76 of Law 25,871); violations of the right to healthcare (coverage of services by obras sociales and private health insurers); challenging manifestly arbitrary sanctions; opposing undue delays in proceedings that affect fundamental rights; disability matters and benefits under Law 24,901; defending the right to public information (Law 27,275); and challenging administrative acts that compromise the exercise of professional or work activities.