Sworn statements and notarised signatures for Spanish use (legitimación de firma)

Terms used

• Declaración responsable — A declaración responsable is a private signed statement that you meet the requirements and keep the supporting documents available.
• Legitimación de firma — A legitimación de firma is a notary's or consul's certification that your signature is genuine, not that the content is true.
• Acta de notoriedad — An acta de notoriedad is a notarial document that records facts as publicly known, for example in inheritance cases.
• Declaración de herederos ab intestato — A declaración de herederos ab intestato is a notarial declaration of who inherits when there is no will.
• Traductor jurado — A traductor jurado is a sworn translator whose translation Spanish offices accept as official.

Key rules

• Declaración responsable: It is a private signed statement and needs no notary.
• Legitimación de firma: It proves only that the signature and identity are genuine, not that your statement is true.
• Foreign affidavit: It is not guaranteed to be accepted, and usually needs an apostille and a sworn translation.
• Office decides: The receiving office's own rules decide which form you need, so ask before you sign.

Spanish offices treat these as different things

A Spanish office will not treat a sworn statement as one single thing. There are three separate forms, and a common-law affidavit may not be accepted in place of any of them. Find out which one your office wants before you sign anything.

Declaración responsable: a signed private statement

A declaración responsable is your own signed statement that you meet the requirements and hold the supporting documents. You also agree to keep those documents available for the administration. It needs no notary.

Offices accept it for things like opening a shop, minor works, and subsidy or tender applications. They also use it for routine statements, such as having no criminal record or not being barred from receiving aid.

Be accurate. A false statement can end the right the declaration gives you and lead to penalties.

Legitimación de firma: a notary confirms your signature

A legitimación de firma certifies that the signature is genuine. The official checks your identity and confirms you signed in front of them, or that the signature is yours. It does not certify that what you wrote is true or legal.

Notaries normally do this. Spanish consuls abroad can also do it for documents you will use in Spain. Some offices ask for it on top of a declaración responsable or on other documents.

Notarial documents: when the law asks for a public document

Some matters need a full notarial document, not just a signature check. Examples are an acta de notoriedad, a declaración de herederos ab intestato, powers of attorney, property deeds, and some civil registry or nationality cases. A foreign affidavit cannot replace these where Spanish law requires a Spanish public document.

If your statement comes from abroad

Offices may accept a foreign affidavit or statutory declaration, but acceptance is not guaranteed. To give it the best chance:

1. Sign it before a notary or competent official in the country that issues it.
2. Add an apostille. If the country is outside the Hague Convention, get consular legalisation instead.
3. Get a sworn translation (traductor jurado) into Spanish if it is not in Spanish.
4. Use a recent document, because offices may refuse one that is too old.

Some EU multilingual standard forms are exempt from these steps. Practice varies between registries, consulates and immigration offices, so ask the receiving office first.

Ask the office before you sign

Ask the office three things: whether a simple declaración responsable is enough, whether it wants a legitimised signature, and whether it needs a full notarial document. The checklist and decision guide below walk you through the choice.

Choosing between options

Which form of statement does the office need from you?

• Declaración responsable: The procedure only asks you to state that you meet requirements, such as no criminal record, a business start or minor works.

• Legitimised signature: The office accepts your own document but wants a notary or Spanish consul to certify that the signature is genuine.

• Notarial document: The law or the office asks for a public document, such as an acta de notoriedad, a power of attorney or a property deed.

Follow the procedure's own rules: a simple statement if it is enough, a legitimised signature if the office asks for an authenticated signature, and a notarial document if it asks for a public document.

Documents you need

• Declaración responsable: a signed private statement that you meet the requirements and hold the supporting documents. You write and sign it yourself, and no notary is needed.

• Signature legitimation (legitimación de firma): a notary's certification that your signature is genuine. Needed only when the receiving body asks for a legitimised signature. A Spanish consul abroad can also issue it.

• Foreign affidavit or statutory declaration: signed before a notary or competent official in the country that issues it, with an apostille from a country in the 1961 Hague Convention or consular legalisation from a country outside it.

• Sworn translation (traductor jurado) into Spanish of any foreign affidavit that is not in Spanish.

Checklist

• Check whether the office wants a legitimised signature or a full notarial deed.

• Sign before a notary or competent official if the document comes from abroad.

• Order a sworn translation into Spanish if the document is not in Spanish.

• Confirm the document is recent enough for the office to accept.

What to watch out for

• Foreign affidavit refused: An office can refuse a foreign affidavit that has no apostille, is unsigned or unwitnessed, is untranslated or is too old. Get the apostille, a witnessed signature and a sworn translation, and use a recent document.

• Wrong form for the procedure: Some procedures need a Spanish public document, such as an acta de notoriedad or a Spanish-law declaración de herederos. A foreign affidavit or a plain declaración responsable will not do. Ask the office which form it needs before you prepare anything.

• False statements: A false declaración responsable can end the right it gives you and lead to penalties. Sign only what is true and keep your supporting documents available for the administration.

Frequently asked questions

Does a declaración responsable need a notary?

No, a declaración responsable is a private signed statement and needs no notary. A notarial form is needed only when the law or the receiving office asks for a public document, such as an acta de notoriedad or a power of attorney.

Does a legitimación de firma prove that what I wrote is true?

No, a legitimación de firma only certifies that the signature is genuine and the signer's identity was checked. It does not certify that the content is true or legal.

Can I legitimise my signature outside Spain for use in Spain?

Yes, a Spanish consul abroad can legitimise your signature for use in Spain. If you sign before a foreign notary instead, the document usually also needs an apostille and a translation.

Why might a Spanish office refuse my foreign affidavit?

A Spanish office may refuse a foreign affidavit that has no apostille, is unsigned or unwitnessed, is untranslated or is too old. It can also refuse it where Spanish law requires a Spanish public document, such as an acta de notoriedad.