The National ID Number or CURP (Clave Única de Registro de Población) is likely one of the most common ID numbers for folks in Mexico. It’s comparable in use to the U.S. Social Security Number, however unlike the SSN, it is algorithmically generated using the person’s full legal name and personal information. Understanding Mexican ID Number construction will help reveal key information about individuals and permit analysts to easily identify false ID numbers.
Naming Conventions in Latin America
Before we focus on the construction of CURPs, it is essential to talk about naming conventions in Latin America. In Spanish-speaking jurisdictions, names are typically comprised of three parts.
An individual’s given name, also known as a first name, is either a single name, such as Alejandra, or more commonly a compound name with or more names, comparable to Francisco Enrique.
The given name is followed by the paternal surname, then the maternal surname. Paternal and material surnames can be compound, however this is less common.
For example, let’s look at professional Mexican soccer player Rafael Márquez Álvarez. The U.S. Division of the Treasury sanctioned him in 2017 for serving as a frontman and holding property for long-time drug kingpin Raúl Flores Hernández, the leader of the Flores Drug Trafficking Organization.
If we break down his name into its three components, his given name is Rafael, his paternal surname is Márquez, and his maternal surname is Álvarez.
Deciphering the Mexican National ID Number
The Mexican National ID Number (CURP) is an eighteen character alphanumeric code. It is structured as follows:
Four letters from the individual’s authorized name: – First letter of the paternal surname – First inner vowel of the paternal surname – First letter of the maternal surname – First letter of the given name
Six numbers which might be the particular person’s date of start in YYMMDD format
One letter describing the person’s gender: “H” for male (hombre) and “M” for female (mujer)
Two letters that are the two-letter state abbreviation for the state where the particular person was born; if the individual was born outside of Mexico, the abbreviation “NE” will probably be used for Nacido en el Extranjero (born abroad)
Three letters from the person’s authorized name: – First inside consonant of the paternal surname – First internal consonant of the maternal surname – First internal consonant of the given name
One character to avoid duplicate CURPs among individuals who have related names, places of birth, and dates of start; the character is a number that ranges from zero to 9 for folks born earlier than 2000 and a letter from A to Z for people born since 2000
One character that may be a checksum
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