Performing due diligence is the most effective initial step in mitigating risks associated with outsourcing. This comprehensive assessment evaluates the vendor's capabilities, security posture, compliance with regulations, and overall suitability for handling sensitive information assets. It ensures that potential risks are identified and addressed before entering into a contractual agreement. Reference:ISACA CRISC Review Manual, 7th Edition, Chapter 2: IT Risk Assessment, Section: Third-Party Risk Management.