Polygraph Truth Verification Services is an authorized polygraph agency with internationally accredited qualifications.

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Welcome to Polygraph Truth Verification Services

Polygraph & Truth Verification Services (PTV Services) was founded in 1997 by John Roberts and Paul van Niekerk.

Since its inception PTV Services grew into a national company employing twelve accredited polygraph examiners in South Africa and operating from branches in Gauteng, Cape Town, Port Elizabeth and Durban with a capability of operating in neighbouring states.

PTV Services has been offering a comprehensive polygraph solution to its clients since 1997, combined our experience exceeds 80 years in the field of lie detection. Our examiners are graduates of accredited American Polygraph Association (APA) as well as Polygraph Association of South Africa (PASA) Schools , and meet with all professional standards set for the industry.

Currently PTV Services offers specific issue polygraph examinations, periodic/maintenance polygraph examinations, per-employment polygraph examinations and sexual offence polygraph examinations for legal, medical, civil and employee related areas.

PTV Services was also instrumental in introducing and getting polygraph evidence accepted at the CCMA and Labour Court (old Industrial Court). We were also selected to conduct polygraph examinations in high profile cases like the SBV robbery in Durban; the Station Strangler in Cape Town, Marieke de Klerk murder as well as the murder of Inge Lotz.

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PTV Official website launched!


We are extremely excited about the launch of our new website. With this site, the aim is to keep the general public up to date regarding the newest developments that are taking place in the lie detection field that might also have an influence on the polygraph profession. Our further aim is to have regular updates on this site and also to bring interesting stories to your attention. With this site, we are convinced that our service delivery to you, our valued customer, will be taken to a new level. Please make sure to visit us on a regular basis in order to stay abreast with the newest happenings in the field of Polygraphy...ENJOY!!