jurat (n.)

also jurate, "one who has taken an oath," early 15c. (mid-14c. in Anglo-French), from Medieval Latin iuratus "sworn man," noun use of past participle of Latin iurare "to swear" (see jury (n.)). Meaning "official memorandum at the end of an affidavit" (showing when and before whom it was sworn) is from 1796, from Latin iuratum, noun use of the neuter past participle.