What term describes an individual who gives information but does not disclose their identity?

The term that best describes an individual who provides information while keeping their identity concealed is an anonymous person. This term specifically highlights the absence of identifiable information about the individual, which is critical in various contexts, especially in law enforcement and intelligence. An anonymous person can share insights or tips without risk of exposure or retaliation, which can be crucial for the safety of the informant and the integrity of the information provided.

While other terms may suggest aspects of identity concealment, they lack the specificity or commonly recognized usage of "anonymous person" in this context. For instance, "solo informant" typically implies an individual who provides information without any corroborative sources but does not necessarily mean their identity is hidden. "Unidentifiable source" could suggest obscured identity, but it is not a commonly recognized term. "Cloaked informant" suggests some level of disguise or hidden identity, but it is less straightforward than simply being anonymous. Thus, "anonymous person" is the most accurate descriptor for someone sharing information without revealing who they are.