What were mexicos requirements for foreign immigrants?

Mexico's requirements for foreign immigrants typically include obtaining a visa, which can vary based on the purpose of the stay, such as work, study, or family reunification. Applicants must provide documentation such as a valid passport, proof of financial stability, and, in some cases, a clean criminal record. Additionally, the Immigration process may require health examinations and the demonstration of ties to Mexico, such as employment or family connections. Specific requirements can vary depending on the visa category and the applicant's country of origin.