one who reveals confidential information in return for money. 1 He later became a police informer. 2 An informer denounced him to the police . 3 The police had planted an informer in the gang.

What do you call an informer?

Snitch. Definition - one who snitches; a tattletale.

What is a legal informer?

INFORMER. A person who informs or prefers an accusation against another, whom he suspects of the violation of some penal statute.