What (who) is declarant - definition

Declarant

·noun One who declares.

declarant

[d?'kl?:r(?)nt]

¦ noun chiefly Law a person or party who makes a formal declaration.

declarant

n. the person making a statement, usually written and signed by that person, under "penalty of perjury" pursuant to the laws of the state in which the statement, called a declaration, is made. The declaration is more commonly used than the affidavit, which is similar to a declaration but requires taking an oath to swear to the truth attested to (certified in writing) by a notary public. In theory, a declarant who knowingly does not tell the truth would be subject to the criminal charge of perjury. Such violations are seldom pursued. See also: affiant affidavit declaration

Wikipedia

Declarant

A declarant, generally speaking, is anyone who composes and signs a statement or declaration alleging that the information he has given therein is true. This differs from an affiant, as in the case of an affidavit the facts therein are sworn to before a notary public or other official, whereas a declaration is usually made by one person for the use of another.

Uttering a statement or declaration which is proven to be false is a crime in many jurisdictions, though usually a separate offence from perjury.

The word declarant, when discussing the hearsay rule and its exceptions, refers to the person who makes an out-of-court statement. For example, if John is on the witness stand and says "Mary said that she was afraid." Mary is the declarant, not John. This concept is important in understanding many applications of the hearsay rule and its exceptions.

https://en.wikipedia.org/wiki/Declarant