The consolidation of public sector banks (PSBs) in India represents a major structural reform aimed at strengthening financial stability, improving operational efficiency, and enhancing global competitiveness. While these mergers are expected to generate long-term benefits, the transitional integration period may introduce operational vulnerabilities that increase exposure to financial crimes. This study examines the relationship between recent PSB mergers and financial crime risks using secondary data from the Reserve Bank of India (RBI), policy documents, and existing scholarly literature. The analysis explores how technological integration, governance restructuring, cultural alignment, and legacy credit portfolios may create temporary control gaps that can be exploited for fraud, cybercrime, and financial misconduct. RBI fraud trend data indicates a rising number of reported fraud cases alongside fluctuating financial losses, highlighting structural changes in fraud typology within Indian banking. The study proposes a conceptual framework linking mergers with operational risk exposure and financial crime opportunities. Findings suggest that while consolidation enhances long-term resilience, the post-merger transition phase requires strengthened governance mechanisms, digital monitoring tools, and unified compliance systems to mitigate financial crime risks.