אִי יְדִיעַת הַחֹק אֵינָהּ פּוֹטֶרֶת

ביטוי (אנגלית)

Ignorance of the law is no excuse

הגדרה (אנגלית)

A person who violates the law cannot justify their actions by claiming they did not know the acts were illegal.

(Modern Hebrew usage)