Extracted From: A LAW DICTIONARY ..., SIXTH EDITION, 1856 by John Bouvier, CHILDS & PETERSON, PHILADELPHIA ITA EST. These words signify so it is. Among the civilians when a notary dies, leaving his register, an officer who is authorized to make official copies of his notarial acts, writes instead of the deceased notary's name, which is required, when he is living, ita est.