ignorantia juris non excusat

== English == === Alternative forms === ignorantia juris neminem excusat ignorantia legis non excusat ignorantia legis neminem excusat === Etymology === Borrowed from Latin ignōrantia factī excūsat, ignōrantia jūris nōn excūsat (“ignorance of fact excuses, ignorance of law does not excuse”). === Phrase === ignorantia juris non excusat Ignorance of the law is not a valid excuse.