Biometric CURP in Mexico: A New National Identity Framework

In 2025, Mexico reformed the General Population Law to transform the Unique Population Registry Code (CURP) into the core of the national identity system. The CURP will no longer function solely as an administrative identifier — it will become an official national identity document incorporating biometric data, available in both physical and digital formats.

Legal Framework: Reform to the General Population Law

The reform introduces significant changes to the General Population Law, particularly Articles 91, 91 Bis, 91 Ter, 91 Quáter, 91 Quinques, 91 Sexies, and 114 Bis.

New Legal Definition of the CURP

This change transforms the CURP from a simple administrative identifier into the foundation of Mexico's national identity system. Article 91 Bis further provides that the CURP incorporating biometric data — such as fingerprints and photographs — will become a mandatory national identification document, universally accepted throughout the country. The reform also contemplates the creation of a Unified Identity Platform, designed to validate, consult, and integrate biometric data associated with the CURP.

Application to Foreign Nationals

The General Population Law expressly includes foreign nationals with regular immigration status within the CURP-based identity system. In practice, foreign nationals with temporary or permanent residency in Mexico are assigned a CURP as part of their registration process before the National Immigration Institute (INM). As the system evolves, the incorporation of biometric data into the CURP is expected to become part of a broader national identity framework applicable to all individuals registered in Mexico under regular immigration status.

Purpose of the Biometric Identity System

The incorporation of biometric data into the CURP responds to the need to strengthen identity verification mechanisms and improve coordination among government authorities and institutional registries. Among its primary objectives are:

• Enabling precise identification of individuals in administrative and legal processes
• Facilitating the search, location, and identification of missing or unlocated persons through coordinated access to biometric information
• Integrating data currently dispersed across multiple authorities and systems
• Ensuring that all individuals have access to a verifiable identity record, even in the absence of other biometric records

Scope and Practical Considerations

Unlike the voter identification card (INE), which is limited to Mexican citizens over the age of 18, the CURP is assigned to all individuals registered in Mexico, including minors. This broader scope allows the biometric CURP system to contribute to the identification of children and adolescents within a unified national framework, which may also support protection and verification mechanisms. The system is also expected to include foreign nationals with regular immigration status, particularly those holding temporary or permanent resident cards, including minors registered as dependents.

Implementation

While the legal framework for the biometric CURP is already in place, its implementation will require further coordination at the state and municipal levels, including the adaptation of local legal frameworks. It is expected that biometric data — such as fingerprints and photographs — will be collected through Civil Registry offices across the country, likely beginning with older adults as part of a phased rollout. At this stage, the system is not yet fully operational, and its practical implementation will depend on the development of administrative procedures and infrastructure by the relevant authorities.

Conclusion

The transition toward a biometric CURP represents a significant development in Mexico's national identity framework, with potential implications for identification, administrative procedures, and legal processes. Unlike the voter identification system, which applies only to adult Mexican citizens, the CURP's broader coverage allows for the inclusion of minors and foreign residents within a unified identity structure. Although the system is not yet fully implemented, the existing legal reforms indicate a clear direction toward a centralized and verifiable identity system applicable to Mexican nationals and foreign residents alike. Staying informed about these developments will be essential to understanding how identity verification, legal processes, and administrative procedures in Mexico may evolve in the coming years.