informer

US /ɪnˈfɔːr.mɚ/
UK /ɪnˈfɔːr.mɚ/
1.

người cung cấp thông tin

a person who gives information in secret, especially to the police:

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Most police informers receive a reward for their information.
:
informationinforminformalinformallyinform oninformation technologyinformed consent