Anonymous Letters (German: Anonyme Briefe) is a 1949 German drama film directed by Arthur Maria Rabenalt, and starring Käthe Haack, Tilly Lauenstein, and O.E.

The film's sets were designed by the art director Willi Herrmann.

In Occupied Berlin the students at a drama school begin receiving anonymous letters threatening to reveal secrets about them.

Considerable mistrusts grows amongst the students, culminating in one of them attempting suicide.

Eventually the head of the school calls in the police to investigate.