ignorance of the law excuses no one in latin
Ignorantia juris non excusat Ignorantia juris non excusat[1] or ignorantia legis neminem excusat[2] (Latin for "ignorance of the law excuses not"[1] and "ignorance of law excuses no one"[2] respectively) is a legal principle holding that a person who is unaware of a law may not escape liability for violating that law merely because one was unaware of its content.