очернение репутации(a term for planting doubt on the authenticity of an individual's bona fides or identity. An example would be creating suspicion through spreading false rumors, manufacturing evidence, etc., that falsely portray someone in a community organization as guilty of malfeasance such as skimming organization funds wikipedia.orgAlex_Odeychuk)
выставление стукачом(a term for planting doubt on the authenticity of an individual's bona fides or identity by presenting the target as an informer of law enforcement)
