Hefker beth-din hefker
Hefker beth-din hefker (alternative spelling: hefker beit din hefker; Hebrew: הפקר בית דין הפקר), "that which is declared by a court ownerless property (hefker) is forthwith accounted ownerless property", is a principle in Jewish religious law that stipulates the right of a Jewish court of law in what regards jus in re aliena (lit. "right to another person's property").