In Mexico, illegal immigration is treated as an administrative violation rather than a crime. Someone found in the country without proper documentation is processed by the National Migration Institute (INM), not charged in criminal court. They can be detained in a migration station and removed, but they do not go to prison and do not receive a criminal record for their presence alone.
Unauthorized Presence Is an Administrative Matter
The rule is set by the Ley de Migración, Mexico’s Migration Law, which took effect in 2011. Article 145 states directly that entering or remaining in Mexico without proper documentation is an administrative infraction, not a criminal offense.1Cámara de Diputados del H. Congreso de la Unión. Ley de Migración A Library of Congress survey of immigration laws worldwide confirms that illegal entry into Mexico is not classified as a crime.2Library of Congress. Criminalization of Illegal Entry Around the World
The practical consequences follow from that classification. A person picked up for irregular presence enters a regulatory process managed by a civilian agency, not the criminal justice system. There is no prosecution, no trial, no sentence, and no criminal record. What the person faces instead is detention while the INM sorts out their status, followed by removal or, in some cases, an opportunity to regularize.
What Happens After Someone Is Apprehended
The INM is the primary immigration enforcement agency and sits under Mexico’s Secretariat of the Interior. It handles visas, border entry, status verification, and removal.3Embassy of Mexico in the United Kingdom. Visas and Migratory Documents INM agents work ports of entry, highway checkpoints, and roving patrols, particularly near the southern border with Guatemala and the northern border with the United States. In recent years, National Guard troops have joined this enforcement, staffing checkpoints alongside INM officers and helping apprehend people traveling without documentation.
When agents identify someone without valid documents, the law calls what follows a “presentation.” The person is taken to a facility called an estación migratoria, an administrative holding center rather than a jail. Its purpose is to hold the person securely while the INM determines their situation and either arranges their removal or processes a claim for legal status.
The law caps how long that hold can last. The INM is required to resolve a person’s immigration status within 15 working days of arrival at a migration station. Longer detention is allowed only in specific circumstances: when identity or nationality cannot be confirmed, when the home country’s consulate needs more time to issue travel documents, when there is no feasible travel route, when a medical condition prevents travel, or when the person has filed an administrative appeal or lawsuit. Even in those cases, the absolute maximum is 60 working days.1Cámara de Diputados del H. Congreso de la Unión. Ley de Migración
Rights Inside a Migration Station
Article 109 of the Migration Law spells out a detailed list of rights for anyone held in a migration station. From intake, detained individuals are entitled to written notice of the reason for their detention and the procedure they face; communication with their home country’s consulate, with the facility obligated to help make contact promptly; access to legal counsel and to their own case file; the right to present evidence and argue their case; an interpreter if they do not speak Spanish; adequate space, food, hygiene supplies, and medical care; visits from family and legal representatives, plus telephone access; and separate living areas for men and women, with provisions to keep families together.
These rights are supposed to be communicated in writing at intake. Whether they are consistently honored is another matter. Mexico’s National Human Rights Commission and international monitors have documented recurring problems inside migration stations: severe overcrowding, unsanitary conditions, inadequate food, and contaminated water. Medical care has been found lacking at many facilities, with some running on a single doctor and offering no mental health services, specialized care for pregnant women, or pediatric support. The UN Committee on the Protection of Migrant Workers has said conditions in some centers amount to cruel, inhuman, and degrading treatment. Reports have also documented excessive force by INM personnel and security forces during apprehension and transfer.
Rights That Do Not Depend on Status
Article 1 of the Mexican Constitution guarantees human rights to every person on Mexican territory, not only to citizens or legal residents. It explicitly prohibits discrimination based on national origin and obligates all government authorities to respect and protect those rights.4Organization of American States. Political Constitution of the United Mexican States Mexico’s foreign ministry describes this as a constitutional mandate placing human rights at the core of government actions.5Secretaría de Relaciones Exteriores. Human Rights in Mexico
The Migration Law turns that principle into specific guarantees. Regardless of immigration status, any person in Mexico has the right to emergency medical care at public or private facilities, and access cannot be restricted or conditioned on documentation. Children have a guaranteed right to basic education and can enroll in school without proof of legal residency.1Cámara de Diputados del H. Congreso de la Unión. Ley de Migración
Children Are Handled Differently
Migrant children are not treated the same way as adults. Under Article 112 of the Migration Law, children cannot be held in migration stations under any circumstances. When the INM encounters an unaccompanied minor, the agency must immediately notify child welfare authorities and transfer the child to DIF, Mexico’s national child welfare system.1Cámara de Diputados del H. Congreso de la Unión. Ley de Migración
A special child protection attorney takes guardianship and decides the appropriate course: family reunification, return to the home country, an asylum application through COMAR, or another form of immigration regularization. The law also prohibits deporting children outright. Minors and victims of crimes committed on Mexican soil can only be subject to assisted return, which is voluntary, or have their status regularized. Implementation has been uneven, and international organizations have documented cases where children end up in facilities not equipped to provide the specialized care the law requires.
Removal: Assisted Return or Deportation
Mexico uses two separate legal pathways to remove people, and the difference between them matters for anyone who might want to return later.
Assisted Return
Assisted return is voluntary. An adult in INM custody who faces no legal restrictions on leaving can request to be sent home, and the INM coordinates the logistics with the home country. The process skips much of the formal administrative procedure and is typically faster.6Comisión Nacional de los Derechos Humanos. Retorno Asistido Because it is treated as a cooperative exit rather than a sanction, assisted return generally does not carry the same re-entry restrictions as formal deportation. For people from nearby Central American countries, it often involves ground transportation by bus.
Deportation
Deportation is the formal, compulsory removal process, and it carries real consequences. Under Article 144 of the Migration Law, a person can be deported for entering without documentation, re-entering after a prior deportation without authorization, misrepresenting their nationality, posing a threat to national security or public safety, presenting fraudulent documents, or failing to comply with a previous order to leave.1Cámara de Diputados del H. Congreso de la Unión. Ley de Migración
The INM sets the length of the re-entry ban case by case. During that period, the person can return only with explicit approval from the Secretariat of the Interior. When the deportation is based on a national security or public safety finding, the ban is permanent. For destinations far from Mexico’s borders, the government arranges flights.
Asylum as an Alternative Track
People arriving in Mexico who are fleeing persecution or violence can apply for refugee status through COMAR, the Mexican Commission for Refugee Assistance. The application must be filed within 30 working days of arrival, though COMAR may accept late applications with an explanation. The process involves an application, an in-person interview, and a decision. Applicants who do not speak Spanish are entitled to an interpreter.
While the application is pending, asylum seekers can request a Visitor Card for Humanitarian Reasons from the INM, which allows them to work legally during the wait. They must stay in the state where they filed unless COMAR authorizes a move; leaving without permission causes the case to be considered abandoned. A rejection can be appealed within 15 business days, and a second rejection can be challenged before a federal judge. Approved applicants receive permanent residence as recognized refugees. COMAR has been chronically underfunded relative to its caseload, and long processing times are common.
One Boundary: Smuggling Is a Crime
The administrative treatment applies to the migrant, not to anyone profiting from moving them. Article 146 of the Migration Law imposes a prison sentence of eight to sixteen years and a substantial fine on anyone who assists or induces a foreign national to enter the country without documentation for financial gain.1Cámara de Diputados del H. Congreso de la Unión. Ley de Migración The sentence increases by half when the person being smuggled is a minor or when the smuggling puts someone’s life or physical safety at risk. Administrative consequences for the migrant, prison time for the smuggler: that split is the core of how Mexican law approaches the movement of undocumented people through its territory.