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About Polygraph Investigative Services
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Polygraph Investigative Services is a Singapore-based licensed private investigative agency specialising
in professional polygraph testing, commonly known as lie detector tests. Its founder and Managing Director is Mr Koa Fung Chew, PPA, PBS, a retired Superintendent of Police from the Singapore Police Force, with more than 34 years
of experience in government and corporate polygraph testing, psychological interviewing and corporate fraud investigation.
Since its inception in 2001, Polygraph Investigative Services has provided its professional lie detector tests aka polygraph services to many multinational companies, small businesses and private individuals in the
Asia Pacific Region, including China, Hong Kong, Australia, New Zealand, Brunei, Malaysia, Indonesia, Thailand, India, Philippines, Middle East - United Arab Emirates, Bahrain, Qatar etc. We conduct these lie detector tests in our office in Singapore
as well as in our clients' respective countries.
Besides conducting lie detector tests, we also provide worldwide professional training in polygraph and psychological interviewing techniques, polygraph equipmemt sales and provide high-end private investigation services.

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We provide polygraph tests for employee screening or as an investigative aid to solve any type of case e.g. theft, fraud, corruption, sabotage, leakage of commercial secrets and other issues
for government agencies, private sector organisations, defence lawyers and private individuals. 
 I am Interested in This Polygraph Service, Tell Me More Details .....
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Background checks using interviewing and polygraph testing for pre-employement screening with regard to qualifications, criminal record, undetected crimes and other unsuitable behaviour or attributes. 
 I am Interested in This Polygraph Service, Tell Me More Details .....
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This polygraph test is used to determine whether one partner had cheated on the other. 
 I am Interested in This Polygraph Service, Tell Me More Details .....
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American Polygraph Association (APA) accredited polygraph training since 1973 - we conduct basic polygraph course, advanced
polygraph course and polygraph screening courses for government agencies around the world. Conducted by The American Institute of Polygraph Technology and
Forensic Psychophysiology, the courses are held in Singapore or in other host countries. Director and Chief Instructor: Mr Lynn P Marcy, M.S, former APA President;
Assistant Director: Supt (Ret.) Koa Fung Chew, PPA, PBS, Primary Instructor certified by APA. 
 See Course Programme And Schedule
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Psychological
Techniques of Interviewing and Interrogation for Law Enforcement Investigation Officers, Polygraph Examiners and people involved in investigative interviewing.
This course is designed to enhance the effectiveness of Law Enforcement Investigators in obtaining confessions and
valuable intelligence in the course of their work using proven psychological techniques. This course is also useful for auditors and in-house investigators in the private sector. 
 Learn More ... |
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Sale of State-of-the-art
polygraph equipment and accessories. Increase your effectiveness with our specially designed Multi-system Marcy Polygraph Countermeasure Chair PT-108 with concealed sensors and wirings. 
 Learn More ...
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Psychological Interviewing of Suspects | Covert Surveillance | Computer Forensics | Discrete background Checks. 
 I am Interested in this Investigative Service, Tell Me More Details .....
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Our Clients
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Government and Law Enforcement Agencies | Multi-national and Government-linked Companies |
Retail Businesses | Guard and Escort Services | Casinos | Defence Lawyers | Private Individuals.  |
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Our Worldwide Service Areas
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Worldwide Polygraph Services, including China, Hong Kong, Malaysia, Taiwan, Thailand, Australia, New Zealand, India, Indonesia, Philippines, Brunei, Pakistan, Singapore, Mexico, Middle East & USA.  |
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