#1 Detective Agency | Lie Detector Test

TVSI was founded in May 1966 as the first company to provide 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, and in 1985 it opened its US office.

Now it continues to service the government and the private sector as well as individuals, local and foreign in detective and investigative expertise in:

• Lie Detector Test
• Surveillance/Undercover
• Forgery Detection
• Hotline Tip System
• Process Serving
• Background Investigation

• Records Verification
• Fingerprint Analysis
• Lifestyle Check
• Locating Person / Property
• Fraud Investigation
• Seminars/Products

TVSI is located at 2/F Cityland Bldg., Pioneer St., Mandaluyong City. It also has a new branch located at Don Francisco Tan Gana Bldg., National Highway, Balibago, Sta. Rosa City, Laguna, CALABARZON.

For your inquiries, you may call 634-7571, 634-7573, or its 24/7 Hotline 843-4343 loc. 5678. You may also send en email to truth@mozcom.com or visit www.truthverifier.com and www.liedetectorphilippines.com.