Institute for Migrant Rights
Railway line at Cianjur station, c. 1890 · KITLV, CC BY 4.0

Migration Jurisprudence from the South › Americas (requested by Mexico)

Juridical Condition and Rights of Undocumented Migrants (Advisory Opinion OC-18/03)

Inter-American Court of Human Rights · Americas (requested by Mexico) · 2003-09-17 · Regional court or body

Citation: OC-18/03, requested by Mexico
Type of case: Constitutional and human rights
Outcome: advisory

Question

May a state deny migrant workers labour rights because they lack immigration status?

What the court decided

No. Equality and non-discrimination are peremptory norms; once employed, a migrant holds the labour rights of a worker whatever their status.

In plain language

Mexico asked the Inter-American Court whether countries may deny labour rights to migrants without papers. The Court said no: once someone works, they have the same labour rights as other workers.

Dalam bahasa sederhana

Meksiko bertanya kepada Pengadilan HAM Antar-Amerika apakah negara boleh menolak hak pekerja bagi migran tanpa dokumen. Pengadilan menjawab tidak: begitu seseorang bekerja, ia punya hak pekerja yang sama dengan pekerja lain.

Pertanyaan: Bolehkah negara menolak hak-hak pekerja bagi pekerja migran karena mereka tidak punya status imigrasi?

What happened afterwards

  • 2003-09-17: Advisory opinion delivered.

Sources

Open this decision in the interactive collection (compare, filter, Indonesian view, downloads).

Cite as: Institute for Migrant Rights (2026), Migration Jurisprudence from the South, version 0.1, https://theimr.org/court-decisions/d/oc-18-2003/. This page summarizes a court decision for research and advocacy; it is not legal advice.

For researchers

This collection of decisions is built for empirical legal scholarship and socio-legal research on migration and the rights of migrant workers, as well as for advocacy.

The coded variables support statistical analysis in law: cross-national comparison, regression and event-history designs, and law and economics questions such as how recruitment fees, wage protection and limits on changing employer affect migrant workers. The data can be downloaded for replication.

Keywords: case law; jurisprudence; judicial decisions; comparative constitutional law; courts and migration; judicial behavior; litigation outcomes; refugee law; non-refoulement; citizenship and nationality; empirical legal studies; empirical legal scholarship; quantitative legal research; statistical analysis in law; law and economics; law and economics of migration; comparative law; socio-legal studies; legal pluralism; migration law; labor migration; migrant workers’ rights; human rights law; access to justice; Global South; Asia; Africa; Middle East; Latin America; Indonesia; open data; replication data.