Affidavit:

A statement signed and sworn to in the presence of a Notary Public.
are true to the best of their knowledge. Affidavits are used to present evidence to the court without actually testifying. Usually, an affidavit will be used to prove facts in a motion—for example, if you are filing a motion to expunge your record and you need to show the court that you are innocent of the crime for which you were arrested, you can swear in an affidavit that you are innocent. However, lying in an affidavit is like lying in court and you can be convicted of perjury for doing so.