Case Study: Callsign achieves auditable fraud policy governance with Creative Navy

Callsign launches fraud policy engine in 8 weeks with Creative Navy

Creative Navy was engaged by Callsign, a company providing AI-enabled fraud detection and authentication for financial services, to address a critical challenge. Callsign had a working fraud model and policy engine concept, but its existing interface was not governable or auditable, preventing analysts from clearly expressing fraud strategies and hindering sales demonstrations with major banks due to a lack of transparency.

Creative Navy applied its Critical Systems Design method to separate model scoring from policy governance, redesigning the analyst workflows and delivering a new React frontend with D3 visualizations and a comprehensive design system. The solution was delivered rapidly, with UX/UI completed in 6 weeks and a coded frontend in 4 weeks. As a result, Callsign reported winning contracts with Lloyds Bank and HSBC following demos of the new interface and used the design system for at least two years, extending it across additional security products.

Callsign