Accredited Forensic POLYGRAPH Examiners · Cape Town

The truth will set you free!

Polygraph testing for corporate investigations, hotels & businesses, HR & CCMA legal proceedings, pre employment screening, vetting services, private matters & media / film content— conducted with absolute discretion across the Western Cape.

Polygraph examination equipment and monitoring instrumentation

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23+Years INTERNATIONAL Experience

35 000+Examinations SINCE 2004

How It Works

A clear, four-stage examination

No surprises and no ambiguity. You will know exactly what happens at every point of the process, from first enquiry to final report.

Confidential Consultation

We discuss your matter, confirm whether polygraph testing is appropriate, and agree on scope, timing and venue.

Pre-Test Interview

The examiner reviews the facts with the subject, clarifies each question and confirms voluntary participation in writing.

Instrumented Examination

Respiration, electrodermal activity and cardiovascular response are recorded across a validated question set.

Analysis & Report

Charts are scored numerically and a written report is issued, with expert testimony available if required.

What We Offer

Forensic polygraph services

Every examination is conducted by a certified polygraphist using calibrated, court-accepted instrumentation and a rigorously documented methodology.

Legal & Forensic Testing

Pre-trial and investigative polygraph examinations for attorneys, advocates and private investigators. Reports are structured for evidentiary review and expert testimony.

Corporate & Pre-Employment

Integrity screening, theft and fraud investigations, and pre-employment vetting for businesses across Cape Town's financial, retail and logistics sectors.

Private & Domestic Matters

Discreet examinations for personal disputes, infidelity concerns, family trust issues and internal household investigations — handled with complete confidentiality.

Statement Verification

Independent verification of witness statements, affidavits and incident reports to strengthen the credibility of your case before it reaches the courtroom.

Insurance & Claims Investigation

Support for insurers assessing disputed claims, staged incidents and misrepresentation, delivered with clear, defensible documentation.

Training & Consultation

Polygraph awareness workshops for HR teams, legal practices and security firms, plus expert consultation on the appropriate use of lie detection.

Certified polygraph examiner conducting a professional interview in a Cape Town office

Who We Are

Over two decades of forensic integrity

Polygraph Investigation Services was founded from our original company Polygraph Truth Investigations that was formed in 2004 and ran until 2021. During Covid the head examiner Marc Bester went to work on an international contract in the UK where he qualified as an accredited examiner to test post conviction sex offenders. He worked there for over 5 years before returning home to continue working in Cape Town. Marc's partner was his father Ian who was an examiner for 21 years and covered the CT office while Marc was overseas. He passed away in 2025. We have served the Cape and other regions of SA doing over 35 000 tests for satisfied clients. Marc has a wealth of expertise and knowledge and is ethical, honest and professional.

Our examiners are trained in the validated comparison question technique and work from a dedicated, sound-controlled facility in the city centre. Every session follows a documented protocol: pre-test interview, instrument calibration, in-test monitoring and a full post-test review.

We are frequently instructed by attorneys in the Western Cape High Court and by corporate clients investigating internal losses. Whatever the matter, our commitment is the same — accuracy, discretion and a report you can rely on.

18+Years in Practice

3,400+Tests Completed

240+Legal & Corporate Clients

Our Environment

Purpose-built testing facilities

Sound-controlled rooms, calibrated instrumentation and a setting designed to put subjects at ease while protecting the integrity of every result.

Corporate security consultation meeting with a client in Cape Town — Pre-employment screening & crim checks

Cape Town city skyline with Table Mountain behind the central business district — Serving the greater Cape Town metro

Business handshake representing a trust agreement between client and examiner — Consent, trust and professional ethics

Confidential investigation documents laid out on an examiner's desk — Confidential case documentation

Portrait of a confident professional examiner in a suit — Certified, court-experienced examiners

Client Feedback

Trusted by legal and corporate teams

Our work is judged on accuracy, professionalism and the confidence it gives clients facing difficult decisions.

The report was thorough, clearly reasoned and stood up to scrutiny in court. Their examiner was calm, methodical and completely professional throughout.

Adv. Michelle NaidooAttorney, Cape Town CBD

We used them for an internal stock-loss investigation across three branches. The process was discreet, fast and gave us answers we could act on immediately.

Deon van WykOperations Director, Retail Group, Bellville

I was nervous about the whole thing, but they explained every step and treated me with respect. The result brought a long family dispute to a close.

Sarah BothaPrivate Client, Southern Suburbs

Get In Touch

Book a confidential examination

Tell us briefly about your matter and we will advise on suitability, turnaround time and cost. All enquiries are handled in strict confidence.

+27 72 269 1317

polygraph@iafriica.com

Testing takes place at client premises

Office Hours

Monday – Friday: 08:00 – 18:00 · Weekends by appointment · After-hours examinations available on request.

Send us an enquiry

Complete the form and a certified examiner will respond shortly.