Aspects of the disclosure relate to computing platforms that utilize improved mitigation analysis and policy management techniques to improve onboarding security. A computing platform may determine that a predetermined period of time has elapsed since finalizing an onboarding process. The computing platform may receive spot-check verification inputs indicative of a user identity and may direct a mitigation analysis and output generation platform to analyze the spot-check verification inputs. The computing platform may receive an indication of a correlation between the spot-check verification inputs and expected spot-check verification inputs. In response to determining that the correlation exceeds a predetermined threshold, the computing platform may determine that an additional verification test should be conducted, and may direct a mobile or other computing device to display an interface that prompts for additional onboarding verification inputs.