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Welcome to the
Global Polygraph Network

Lie Detection Experts Available Worldwide

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GPN is the world's largest referral service for private polygraph (lie detector) testing, offering services at nearly 500 different testing locations worldwide. Our examiners are thoroughly screened and must submit to a Quality Control review before being considered for membership. Nearly half of the examiners submitting applications are denied membership for lack of qualifications or experience. Members must complete regular continuing education programs to ensure they are using the most up-to-date and validated techniques. Our clients will never be referred to an untrained or fraudulent examiner

GPN will provide testing for virtually any situation, provided the request is not in conflict with any current law or regulation. We do provide services to the general public as well as attorneys, therapists, corporations, and government agencies. Click here for a comprehensive list of services available.

Click here to read what our customers are saying

During the 1980's owner Michael Martin began regularly conducting polygraph exams for national media organizations which generated a great deal of demand for Michael's services. Unfortunately, outside of Michael's basic service area clients were finding it difficult to afford the prohibitive fees necessary for Michael to travel to locations elsewhere in the United States. Michael began to enlist the aid of other qualified polygraph examiners to handle this additional workload, within a few years the volume of cases had become too great to support an informal network, and in 1987 the concept for the Nationwide Polygraph Network was born. For the first time, clients all over the United States were able to locate and hire highly qualified private examiners using this new "Network" solution. Due to the overwhelming response to this concept, requests began to flood in from Canada and other countries as well, so in 2003 the Nationwide Polygraph Network became the Global Polygraph Network. GPN members now offer testing at nearly 500 different locations worldwide.