Frequently Asked Questions about Spanish ID Documents

A valid DNI must meet these requirements:

• 8 numbers followed by a letter
• The letter must match the calculation algorithm
• It cannot contain the letters I, Ñ, O, U

You can use our DNI validator to check it.

The letter is calculated by dividing the number by 23 and using the remainder to assign a letter according to a specific table. Check the complete formula or use our calculator.

The NIE is the identification number, while the TIE (Foreigner Identity Card) is the physical document where the NIE appears. More information about NIE.

• X: First series of NIEs (oldest)
• Y: Second series, when X was exhausted
• Z: Current series, when Y was exhausted

The initial letter indicates the type of organization. For example:

• A: Public Limited Companies
• B: Limited Liability Companies
• G: Associations
• See complete list

A valid CIF must have:

• Valid initial letter
• 7 numbers (including provincial code)
• Correct control digit/letter

Use our CIF validator to check it.

For Spanish individuals, the NIF coincides with the DNI. The difference is in its use:

• DNI: Identity document for personal identification
• NIF: Tax identification number for tax procedures

For foreigners, the NIF corresponds to the NIE. For companies, the NIF is the CIF.

No. The documents generated by our tools are exclusively for software testing, development, and training. Using false identifications in official documents is illegal and may constitute a crime of document forgery.