RFC is a tax I.D. number for Mexico. The letters stand for Registro Federal de Contribuyentes. The MexicanTax Administration Service assigns a unique number for each person.

Take for example the following RFC: VECJ880326 XXX where:

• VE is the first letter of the father’s last name plus the first internal vowel of the father’s last name.
• C is the initial of the maternal surname.
• J is the initial of the first name.
• 88 are the last two digits of the year of birth.
• 03 is the month of birth.
• 26 the day of the month you were born
• The last XXX is a number provided by the SAT