declarant

 
Pronunciation: /dɪˈklɛːr(ə)nt/
chiefly Law

noun

  • a person or party who makes a formal declaration.

adjective

  • making or having made a formal declaration: the declarant state

Origin:

late 17th century: from French déclarant, present participle of déclarer, from Latin declarare 'make quite clear' (see declare)