Truth Verifier Systems Incorporated  

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TRUTH VERIFIER SYSTEMS, INC. (TVSI) is a private detective agency in the Philippines noted for its exemplary services expertise, integrity and truthful reporting.



The TRUTH VERIFIER SYSTEMS, INC. (TVSI)  was founded in May 1966 as the first Private Investigator Agency  and lie detector company to provide advanced Lie Detector Test services in the Philippines. It was a business partnership between CWO Chandler F. Williams, Capt. Conrado G. Dumlao and Dr. Alcyone Thor Reyes. In 1973, the company was incorporated.




It is the Philippines’ first and leading licensed private detective and lie detector company is noted for its exemplary service, expertise, integrity and truthful reporting.  Founded in May 1966, TVSI has given quality service for 50 years.



The company is duly licensed by the Philippine National Police (PNP) with License No.: PDA-001. Its professionalism and dedication to quality service made the company topped among other emerging detective agencies. To date, T... [Detailed Introduction]