Background: Infiltrators and informants operate undercover, often finding themselves immersed in various exposed situations. Aim: To determine the challenges in the roles faced by infiltrators and informants. Method: A litterature review was conducted with five articles sourced from ProQuest and PsycInfo. Each article underwent analysis using a five-step model. Results: Criminals exhibit resistance techniques and possess extensive knowledge of the methodologies used by infiltrators and informants. Lack of adequate support, coupled with prevalent feelings of stress and anxiety were frequently reported. Conclusion: The findings underscore the challenges faced by both infiltrators and informants, highlighting the need for enhanced support for well being and workstructures.