Mexico

Article 30(A) of the Constitution lists those who are Mexican by birth: among them, persons born in the Republic and persons born abroad of Mexican parents. The 2021 amendment removed a generational bottleneck that had previously left some children of foreign-born Mexicans outside the rule, and modern consular practice reflects that broader text.

Because nationality by birth cannot be stripped, the legal question in most files is not whether the ancestor remained Mexican — they did — but whether the family can prove each birth and each parent-child link to the standard the registries require.

The anchor is the ancestor’s Mexican birth record, held by the civil registry of the relevant state and increasingly retrievable in certified digital form. From there, each foreign-born generation is registered in turn — commonly at a consulate — producing a Mexican birth record for each, the CURP population-registry key through RENAPO, and eventually the passport.

Where records disagree — a name shortened at the border, a birthplace recorded loosely — Mexican registries expect rectification before registration, and we manage those corrections with local counsel where they arise.

Mexico’s difficulty is rarely the law and usually the queue: consular appointment systems in some cities are heavily oversubscribed, and patience — or flexibility about where to file — makes a real difference. Families with records from the revolutionary period or from parishes rather than civil registries need genuine archival work before the procedural stage can begin.

As elsewhere, administrative practice evolves; requirements lists published by individual consulates are a floor, not always the whole picture, and are best confirmed close to filing.