The Unwritten Law is a 1932 American pre-Code mystery film directed by Christy Cabanne and starring Greta Nissen, Richard "Skeets" Gallagher, and Mary Brian.

It was distributed by the independent Majestic Pictures.

[2] A film crew board a liner to head overseas for some location shooting.

While on board the film's producer is murdered, with many different members of the cast and crew having motives to kill him.

This article about a mystery film is a stub.