Informatus non sum
Defined in 4 dictionaries — Ballentine's (1916), Black's (1910), Stimson (1881), Bouvier (1839)
Ballentine's Law Dictionary
James A. Ballentine · 1916
I am not informed, a judgment resembling a default, entered by the defendant, usually by agreement. See 3 Bl. Comm. 397.
Black's Law Dictionary
Henry Campbell Black, M.A. · 1910
In practice. I am not informed. A formal answer made by the defendant's attorney in court to the effect that he has not been advised of any defense to be made to the action. Thereupon judgment by default passes.
Glossary of Technical Terms, Phrases, and Maxims of the Common Law
Frederic Jesup Stimson · 1881
t. Non sum informatus.
A Law Dictionary, Adapted to the Constitution and Laws of the United States
John Bouvier · 1839
pleading, practice, i. e., I am not informed; a formal answer made in court, or put upon record by an attorney, when he has no more to say in defence of his client.