I think that's what they want.

Dictionary
af·fi·da·vit (ăf'ĭ-dā'vĭt) pronunciation
n.

A written declaration made under oath before a notary public or other authorized officer.

[Medieval Latin affīdāvit, from third person sing. past tense of Latin affīdāre, to pledge. See affiance.]

Legal Dictionary
af·fi·da·vit ('a-fə-`dā-vət)
n.

[Medieval Latin, he/she has pledged faith, third singular perfect of affidare see affiant]
A sworn statement in writing made esp. under oath or on affirmation before an authorized magistrate or officer compare deposition examination
WordNet
Note: click on a word meaning below to see its connections and related words.

The noun affidavit has one meaning:

Meaning #1: written declaration made under oath; a written statement sworn to be true before someone legally authorized to administer an oath
Wikipedia
affidavit

An affidavit is a formal sworn statement of fact, written down, signed, and witnessed (as to the veracity of the signature) by a taker of oaths, such as a notary public. The name is Medieval Latin for he has declared upon oath.

One use of affidavits is to allow evidence to be gathered from witnesses or participants that may not be available to testify in person before the court. In some countries, criminal defendants routinely execute anyone that testifies or will testify against them.

In American jurisprudence, it is very unusual to allow an unsupported affidavit to be entered into evidence with regard to material facts which may be dispositive of the matter at bar. Affidavits from persons who are dead or otherwise incapacitated, or who cannot be located or made to appear may be accepted by the court, but usually only in the presence of corroborating evidence. A formerly written affidavit, which reflected a better grasp of the facts closer in time to the actual events, may be used to refresh a witness' recollection. Materials used to refresh recollection are admissible as evidence.

Some types of motions will not be accepted by a court unless accompanied by an independent sworn statement or other evidence, in support of the need for the motion. In such a case, the court will accept an affidavit from the filing attorney in support of the motion, as certain assumptions are made, to wit: The affidavit in place of sworn testimony promotes judicial economy. The lawyer is an officer of the court and knows that a false swearing by him, if found out, could be grounds for severe penalty up to and including disbarment. The lawyer if called upon would be able to present independent and more detailed evidence to prove the facts set forth in his affidavit.


Español (Spanish)
n. - afidávit, declaración jurada.
http://www.answers.com/affidavit

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Note added at 53 mins (2005-05-16 23:20:23 GMT)
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Haría falta más contexto para estar más segura.
Suerte!!!!!!!!!!

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Note added at 54 mins (2005-05-16 23:21:25 GMT)
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acta notarial: affidavit.
http://www.wordreference.com/es/en/translation.asp?spen=nota...

An affidavit, to me, is just a certificate attesting to something. I think the term you refer to refers to something more: is this a person of integrity or not.

Good luck!

Patricia

Without any context it looks complicated, but one has two options here: either it is an affidavit declared by the person, or it is a document issued by another party, id. e. the government, the municipality, etc. Here we call one of these papers Certificado Judicial. Good luck.