Legal nature
Established through the first letter of the NIF, and distinguishing the following:
- Letter a: Anonymous Societies
- Letter B: Limited Liability Companies
- Letter C: Regular Collective Societies
- Letter D: Limited Partnerships
- Letter E: Community Property Societies
- Letter F: Cooperative Societies
- Letter G: Associations
- Letter P: Local corporations
- Letter Q: Public bodies
- Letters: Government and regional governments.
- Letter R: Congregations and Religious Institutions
- Letter U: Temporary Business Associations
- Letter W: Permanent establishments of foreign entities
- Letter N: Foreign Legal Entities
- Others: Rest of the letters of the NIF