obsignātor, ōris, m. [obsigno],
a sealer, sealer up (class.): litterarum obsignator, Cic. Clu. 66, 186.—Esp., the witnesses who set their seals to a will , Cic. Clu. 13, 37: testamenti, id. Att. 12 18, b, 2: decisionis, id. Fl. 36, 89.
obsīgnātor ōris, m obsigno, a sealer, one who attests under seal : litterarum: obsignatores adduci...
An Elementary Latin Dictionary