UK Charity Fraud: Using Polygraph to Investigate Misuse

How Widespread Is Charity Fraud?

Fraud against UK charities is a persistent and serious problem. According to the BDO and Fraud Advisory Panel's Charity Fraud Report, 42% of charities were victims of fraud in 2024 [1]Verified Charity Fraud Report 2024
Confirms 42% of charities were fraud victims in 2024, with 50% of fraud committed by internal perpetrators and 84% suffering financial losses, with an estimated 10,000 to 20,000 incidents of fraud across the sector [2]Verified Navigating the evolving landscape of fraud – what charities need to know
Confirms estimated 10,000 to 20,000 fraud incidents across the charity sector and 44% of charities lacking fraud response plans. In 2025, while the figure improved to 34% of charities reporting fraud incidents, the threat remains substantial [3]Verified Charity Fraud Report: A Five-Year Review (2025)
Confirms 34% of charities reported fraud in 2025 with 73% suffering financial losses and 52% expecting threat to increase by 2026.

The Charity Commission for England and Wales — the independent regulator overseeing over 170,000 registered charities [4]Verified Charity Commission Annual Report and Accounts 2024-25
Confirms 170,862 registered charities, £102bn regulated charity income, and 843 uses of inquiry powers in 2024-25 — regulated £102 billion of charity income during 2024-25 [5]Verified Charity Commission fraud strategy and investigation guidance
Confirms four-strand approach to fraud strategy, trustee responsibilities, and emphasis on prevention and sound financial controls. The Commission used its inquiry powers 843 times in 2024-25, up from 530 the previous year, and disqualified 37 trustees [6]Verified Almost three quarters of insider frauds enabled by excessive trust
Confirms cultural factors contributed to 70% of insider frauds and only 19% resulted in prosecution. In the preceding year alone, the Commission opened 603 cases relating to fraud and a further 99 cases relating to cyber-crime [7]Verified Sex Offender Management Using the Polygraph: A Critical Review
Confirms polygraph reliably elicits increased disclosures and functions as an effective truth facilitator.

These figures represent only reported incidents. The true extent of charity fraud is almost certainly higher, as the National Fraud Authority has previously concluded there is substantial under-reporting of fraud by the charity sector [8]Verified Charity Fraud Trends and Prevention Strategies
Confirms 2024 losses ranging from £102,000 to £197,000 per case and non-financial impacts felt by 78% of affected charities. For trustees and charity leaders who suspect financial misconduct, having access to professional investigation tools — including polygraph testing — is essential for protecting charitable assets and donor trust.

The Insider Threat: When Fraud Comes from Within

Perhaps the most alarming finding from recent charity fraud research is the scale of internal fraud. In 2024, half of all detected charity fraud was committed by individuals within the charity, including staff, volunteers, and trustees [9]Verified Charity fraud in the UK: Risks, trends and how charities can prevent it
Confirms 34% fraud rate in 2025, average losses of £11,000-£110,000, and 62% believing cost-of-living crisis increased fraud risk. The most common type was misappropriation of cash or assets by staff and volunteers, affecting 40% of fraud-victim charities [10]Verified Serious concerns over use of £22 million triggers investigation by charity regulator
Confirms statutory class inquiry into charities that cashed £22 million in cheques through a Hackney company.

The Charity Commission's own research found that cultural factors — such as placing excessive trust or responsibility in individuals, or the lack of internal challenge and oversight — contributed to 70% of insider frauds [11]Verified Charity law and regulation – House of Commons Library
Confirms Charities Act 2011 provides the main statutory basis and Commission powers to investigate misconduct and open statutory inquiries. Only 19% of frauds reported to the authorities resulted in a prosecution, while just 38% of charities recovered part or all of the money or assets taken [12]Verified Credibility Assessment Using Bayesian Credible Intervals: A Replication Study
Confirms high accuracy with event-specific polygraphs using modern statistical approaches and Bayesian credible intervals.

These statistics highlight a critical gap: charities are vulnerable to those they trust most, and traditional investigation methods often fail to identify perpetrators or recover losses. This is exactly where polygraph testing can make a decisive difference. By confidentially examining individuals who had access to misused funds, trustees can quickly narrow the focus of an investigation and encourage truthful disclosures. Research has shown that polygraph testing reliably elicits increased disclosures, functioning as an effective "truth facilitator" [13]Verified Polygraph testing measures: Equalities Impact Assessment – GOV.UK
Confirms Section 28 of Offender Management Act 2007, over 5,000 tests on sexual offenders, and two-thirds producing significant disclosures.

Financial Impact and Hidden Costs

The financial consequences of charity fraud are severe. In 2024, 84% of charities that experienced fraud suffered financial losses [14]Verified Crime and Policing Bill: overview impact assessment
Confirms over 9,000 polygraph tests conducted since 2014 and expansion to murder and domestic abuse offenders, with individual cases seeing losses ranging from £102,000 to £197,000 [15]Verified Offender Management Act 2007 – Polygraph conditions
Confirms statutory basis for polygraph testing of offenders released on licence in England and Wales. Even in 2025, 72% of fraud-victim charities reported financial losses, with average losses per case ranging from £11,000 to £110,000 [16]Verified Charities and the Economic Crime and Corporate Transparency Act 2023
Confirms ECCTA section 199 failure to prevent fraud came into force 1 September 2025, thresholds, and section 196 senior manager attribution offence. Alarmingly, only 32% of charities were successful in recovering their losses [17]Verified Whistleblowing disclosures made to the Charity Commission 2024-25
Confirms 546 disclosures received and cases opened in 363 (66%) of them, plus partnership with charity Protect for whistleblower support.

Beyond financial losses, 75% of affected charities reported non-financial repercussions including reputational damage and decreased morale [18]Verified A Comprehensive Meta-Analysis of CIT Research Using MacLaren's Data
Confirms strong discrimination between informed and uninformed examinees in the Concealed Information Test. These effects can be long-lasting, especially in a sector that relies heavily on public trust [19]Verified The Identification of Concealed Memories Using Event-Related Potentials
Confirms 90% and above hit rate in detecting concealed thought using P300-based methods. The cost-of-living crisis has further heightened fraud risk, with 62% of respondents believing economic challenges have pushed financially pressured individuals towards fraudulent activity [20]Verified Multimodal Machine Learning for Deception Detection
Confirms multimodal dataset spanning EEG, ECG, EOG, eye-gaze, GSR, audio, and video for improved deception detection.

In a notable 2025 investigation, the Charity Commission launched a statutory class inquiry after 105 charities were found to have cashed cheques worth £22 million with a single company in Hackney between December 2021 and March 2023 [21]Verified Detecting Deception Using Functional Magnetic Resonance Imaging
Confirms 90% accuracy in fMRI-based lie detection at the individual level in mock crime studies. Cases like this demonstrate the scale at which charitable funds can be diverted. For trustees dealing with similar concerns, tools like polygraph testing and asset tracing investigations can be invaluable in identifying where funds have gone.

Trustee Duties Under the Charities Act 2011

The Charities Act 2011 provides the main statutory basis for charity law in England and Wales [22]Verified Using Brain Imaging for Lie Detection: Where Science, Law and Research Policy Collide
Confirms 76–90% accuracy range for brain imaging under controlled conditions with translational gaps noted. Under this legislation, charity trustees have general control over a charity's administration and must comply with legal duties set out in their governing document [23]Verified Legal and practical aspects of using the polygraph in the Republic of Lithuania
Confirms Lithuania developed comprehensive legal regulations for polygraph use including the Event Knowledge Test modification of CIT. Trustees are custodians of their charities and are legally responsible for ensuring that charitable funds are properly used [24]Verified Interrogations using polygraph in Russia: 15 years of legal application
Confirms polygraph use increased annually across Russian government departments over 15 years of legal application.

Key trustee obligations relevant to fraud prevention include: keeping proper and adequate financial records with full audit trails [25]Verified Internal charity fraud risk remains a significant concern, survey finds
Confirms financial misreporting more than doubled to 11% in 2025 and failure to prevent fraud offences introduced September 2025; ensuring that funds are spent properly and consistently with the charity's purpose and objectives [26]Verified How to report a serious incident in your charity
Confirms trustee obligation to report serious incidents including fraud and consequences for failure to report; reporting serious incidents — including fraud — to the Charity Commission [27]Verified Hansard: Offender Management Act 2007 (Commencement No. 6) Order 2013
Confirms UK government citing polygraph accuracy of 80-90% and commencement of mandatory polygraph testing for sex offenders; and implementing sound financial controls as an essential defence against fraud [28]Verified The Concealed Information Test: An Alternative to the Traditional Polygraph
Confirms CIT detects guilty knowledge of a crime and is particularly useful for investigations requiring a second examination approach.

Trustees who fail to report a serious incident that subsequently comes to light may be considered guilty of mismanagement, which could prompt regulatory action [29]Verified Broadening the Use of the Concealed Information Test in the Field
Confirms Japan uses CIT in approximately 5,000 criminal investigations per year with about 100 polygraph examiners. Under the Charities Act 2011, persons convicted of offences involving dishonesty or deception are automatically disqualified from acting as charity trustees [30]Verified Ensuring Public Safety: Beware of Fake Polygraph Examiners in the UK
Confirms concerning rise in unqualified individuals offering lie detector services in the UK without proper certification. When trustees suspect fraud, conducting a thorough investigation — potentially including polygraph testing — demonstrates due diligence and responsible governance.

The Economic Crime and Corporate Transparency Act 2023

A landmark piece of legislation reshaping the fraud landscape for UK charities is the Economic Crime and Corporate Transparency Act 2023 (ECCTA) [31]Verified Inquiry into grant making charity
Confirms Charity Commission inquiry recovering approximately £650,000 in unauthorised trustee benefits. This Act introduced two critical new offences that affect charities directly.

Section 199 created a "failure to prevent fraud" offence that came into force on 1 September 2025 [32]Verified Detection of Deception Using fMRI: Better than Chance, but Well Below Perfection
Confirms fMRI detection was significantly better than chance and highlights ongoing development of brain imaging for forensic use. It applies to large incorporated organisations — including charities — that meet two of three criteria: more than 250 employees, turnover exceeding £36 million, or total assets above £18 million. Under this provision, a charity can be held criminally liable if an associated person (employee, agent, or subsidiary) commits fraud intending to benefit the charity. The only defence is demonstrating that reasonable fraud prevention procedures were in place.

Section 196 is arguably even more significant for smaller charities. Under this provision, charities of any size can be criminally liable if a senior manager commits certain economic crimes while acting within the scope of their authority. Critically, there is no defence of having had reasonable fraud prevention measures in place for this offence.

These legislative changes mean that all charities — large and small — must take proactive steps to prevent and investigate fraud. Incorporating polygraph testing into a charity's fraud investigation toolkit demonstrates a commitment to thorough, evidence-based inquiry. Learn more about how whistleblowers can use polygraph to prove their credibility when raising concerns about charity fraud.

Charity Commission Powers and Whistleblowing

The Charity Commission has extensive powers to investigate fraud within charities. Under section 46 of the Charities Act 2011, the Commission can open statutory inquiries where it identifies serious regulatory concerns such as significant financial loss, harm to beneficiaries, or misuse of a charity for illegal purposes. During inquiries, the Commission can gather evidence and take remedial action, including restricting financial transactions.

Whistleblowing plays a vital role in detecting charity fraud. The Commission is a "prescribed person" under the Public Interest Disclosure (Prescribed Persons Order) 2014, and whistleblowing law protects workers who make qualifying disclosures under the Employment Rights Act 1996 (as amended by the Public Interest Disclosure Act 1998). In 2024-25, the Commission received 546 whistleblowing disclosures and opened cases in response to 363 (66%) of them.

The Commission partners with the independent charity Protect, which operates a confidential advice line on 0800 055 7214 for potential whistleblowers. For individuals who have raised concerns and wish to strengthen their position, a voluntary polygraph examination can provide powerful corroboration. Our guide to whistleblowing and polygraph testing explains how this works in practice.

The Science Behind Polygraph Examinations

Polygraph testing — also known as lie detector testing — measures and records physiological responses including heart rate, blood pressure, respiration, and skin conductivity while a subject answers a series of carefully structured questions. The fundamental principle is that deceptive answers produce distinct physiological responses that trained examiners can differentiate from truthful responses.

Modern polygraph testing has achieved remarkable levels of accuracy. Research using Bayesian credible intervals and the ESS-M scoring method has confirmed high accuracy with event-specific polygraphs using four relevant questions, demonstrating the utility of modern statistical approaches to credibility assessment. The UK government itself has acknowledged that polygraph testing can achieve accuracy levels of around 80% to 90%, which is well above chance, with some estimates reaching up to 95%.

Advanced detection methods continue to evolve. The Concealed Information Test (CIT) — also known as the Guilty Knowledge Test — is particularly relevant to fraud investigations. A comprehensive meta-analysis confirmed strong discrimination between informed and uninformed examinees using the CIT. P300-based neurological methods have reported hit rates of 90% and above in detecting concealed information. Multimodal machine learning approaches now integrate EEG, ECG, eye-gaze, galvanic skin response, audio, and video data for even more robust detection.

To understand the broader science, visit our Polygraph Research Database which catalogues peer-reviewed studies on deception detection.

The Concealed Information Test: Ideal for Financial Fraud

The Concealed Information Test (CIT) is uniquely suited to charity fraud investigations. Unlike traditional polygraph techniques that assess deception to direct questions, the CIT detects whether a subject possesses specific knowledge of a crime or financial irregularity. This is critical in charity fraud cases where trustees need to determine which individuals had knowledge of, or involvement in, the misuse of funds.

The CIT works by presenting crime-relevant details — such as specific account numbers, transaction amounts, or the identity of recipients — alongside plausible but irrelevant alternatives. A person who genuinely possesses knowledge of the fraud will produce consistently stronger physiological responses to the relevant items. Research has shown the CIT to be a highly valid method of memory detection with good scientific validity.

Japan provides a compelling model for the practical application of the CIT, where it is the only polygraph technique used in criminal investigations, with approximately 100 examiners handling around 5,000 cases per year. Countries including Lithuania have developed comprehensive legal regulations governing polygraph use, primarily using the Event Knowledge Test — a modification of the CIT — in law enforcement applications.

For charity trustees investigating suspected embezzlement, the CIT approach can help answer questions such as: Does this individual know the specific bank account to which funds were diverted? Are they aware of the exact amounts involved? Do they recognise details about how financial records were falsified? This focused, knowledge-based approach provides trustees with actionable intelligence rather than simple guilty-or-not-guilty conclusions.

UK Government's Established Use of Polygraph Testing

The UK already has an established legal framework for polygraph testing in official settings, which demonstrates institutional confidence in the technology. Section 28 of the Offender Management Act 2007 enables the Secretary of State to impose polygraph testing as a licence condition for eligible offenders convicted of specified sexual offences. The current arrangement commenced in January 2013 following a successful pilot.

Since 2014, the Probation Service has carried out over 9,000 polygraph tests. Two-thirds of those tests resulted in significant disclosures that enabled offender managers to refine and improve risk management plans. The scope of mandatory polygraph testing has been progressively expanded: the Counter-Terrorism and Sentencing Act 2021 extended it to terrorist offenders, and the Domestic Abuse Act 2021 enabled a pilot for domestic abuse perpetrators.

The Crime and Policing Bill 2025 proposes to extend polygraph testing further to offenders convicted of murder who pose a risk of sexual offending. This continuous legislative expansion reflects growing confidence in polygraph testing as a valuable risk management and truth-facilitation tool. Research has acknowledged that post-conviction polygraph testing reliably elicits increased disclosures, making it an effective tool for uncovering hidden information [13]Verified Polygraph testing measures: Equalities Impact Assessment – GOV.UK
Confirms Section 28 of Offender Management Act 2007, over 5,000 tests on sexual offenders, and two-thirds producing significant disclosures.

The same principles that make polygraph testing effective for offender management — its ability to encourage truthful disclosure and detect concealed information — make it equally powerful for charity fraud investigations.

Common Charity Fraud Scenarios

Polygraph testing can be valuable across a wide range of charity fraud scenarios. The most common types of charity fraud in 2025 included misappropriation or theft of assets including cash (34%), payment diversion and authorised push payment fraud, staff expenses fraud, and financial misreporting — which more than doubled to 11% from 5% the previous year.

Specific situations where trustees should consider polygraph testing include:

Embezzlement by finance staff: When financial discrepancies are discovered and a small number of individuals had access to the accounts, polygraph testing can quickly identify who possesses knowledge of the irregularities.

Expenses fraud: With 29% of charities experiencing staff expenses fraud, polygraph testing can resolve disputes where documentary evidence is inconclusive.

Diversion of donated funds: Where donations appear to have been redirected, polygraph testing can determine which individuals are aware of the diversion and how it was carried out.

Trustee self-dealing: Cases where trustees may have authorised inappropriate payments to themselves or connected parties, similar to the Charity Commission inquiry that recovered approximately £650,000 in unauthorised trustee benefits.

Hidden assets: When fraud involves the concealment of misappropriated funds, polygraph testing can be combined with hidden asset investigations to trace where charitable funds have gone.

Protecting Elderly Donors and Vulnerable Beneficiaries

Charities that serve vulnerable populations face particular risks. Fraudsters may exploit the trust placed in charitable workers who interact with elderly donors, disabled beneficiaries, or children. The Charity Commission has emphasised that safeguarding assets is closely linked to safeguarding people, and trustees must protect both.

When concerns arise about staff or volunteers exploiting their access to vulnerable individuals for financial gain, polygraph testing can help trustees investigate sensitively without relying solely on the testimony of those who may be unable to advocate for themselves. Our guide to protecting elderly parents with lie detector tests covers related scenarios in detail.

Scientific methods continue to advance in detecting deception and concealed knowledge. Research into fMRI-based lie detection has demonstrated 90% accuracy in identifying deceptive subjects at the individual level in controlled settings, while combined approaches using event-related potentials and behavioural measures have achieved hit rates of 90% and above. These advances in the broader science of credibility assessment underpin the continued refinement of practical polygraph techniques used in the field.

The Voluntary Polygraph: Building Trust and Resolution

In the charity context, polygraph testing is typically voluntary. A trustee board investigating suspected fraud may invite individuals to participate in a polygraph examination as part of a broader investigation process. This voluntary approach has several advantages.

First, willingness to take a polygraph test itself sends a powerful signal. Individuals who are confident in their innocence often welcome the opportunity to clear their name. Conversely, reluctance to participate — while not evidence of guilt — may inform the direction of further investigation.

Second, the pre-test and post-test interview phases of a polygraph examination often yield important information. Research on post-conviction sex offender testing has consistently shown that the interview process surrounding polygraph examinations produces significant disclosures, independent of the test results themselves [13]Verified Polygraph testing measures: Equalities Impact Assessment – GOV.UK
Confirms Section 28 of Offender Management Act 2007, over 5,000 tests on sexual offenders, and two-thirds producing significant disclosures. In charity fraud investigations, individuals may disclose crucial information during these interviews that accelerates the resolution of the case.

Third, polygraph results can complement other evidence. While polygraph results are not typically admissible in UK criminal courts, they can be highly valuable in internal investigations, civil proceedings, and regulatory matters. They provide trustees with an additional layer of evidence when deciding whether to refer matters to the police or the Charity Commission.

Body language analysis alone is insufficient for detecting deception — science has debunked many popular myths about lying behaviour. Professional polygraph testing provides objective, measurable data that goes far beyond subjective impressions. Learn more about why body language myths have been debunked by science.

Choosing a Qualified Polygraph Examiner

The quality of a polygraph examination depends entirely on the qualifications and experience of the examiner. Trustees should ensure that any polygraph examiner they commission is a member of a recognised professional body such as the British and European Polygraph Association (BEPA), the British Polygraph Association (BPA), or the American Polygraph Association (APA).

The UK has seen a concerning rise in unqualified individuals offering lie detector services without proper training or certification. Trustees should verify credentials directly with the relevant professional body and ensure that the examiner uses modern, computerised instruments and follows established testing protocols.

For charity fraud investigations, it is particularly important to select an examiner with experience in financial crime and corporate investigations, rather than one who primarily handles relationship or infidelity cases. The examiner should be familiar with the Concealed Information Test and event-specific testing protocols, as confirmed by research demonstrating high accuracy with these methods. Book a polygraph test with a qualified examiner through our professional service.

Integrating Polygraph into a Comprehensive Investigation

Polygraph testing should be part of a broader investigation strategy, not a standalone measure. Trustees should consider the following framework:

1. Document the concern: Record all suspicious transactions, discrepancies, or reports that triggered the investigation. Maintain a clear audit trail.

2. Secure financial records: Ensure that all relevant financial documents, bank statements, and electronic records are preserved before any investigation is announced.

3. Seek legal advice: Consult with a solicitor experienced in charity law and employment law before conducting interviews or polygraph testing. This is essential for protecting both the charity and the rights of individuals involved.

4. Report to the Charity Commission: Trustees have a duty to report serious incidents, including suspected fraud, to the Commission [27]Verified Hansard: Offender Management Act 2007 (Commencement No. 6) Order 2013
Confirms UK government citing polygraph accuracy of 80-90% and commencement of mandatory polygraph testing for sex offenders. Failure to report may itself constitute mismanagement.

5. Commission polygraph testing: Engage a qualified examiner to test individuals who had access to the funds or information in question. The examiner will design test questions tailored to the specific circumstances.

6. Act on findings: Use polygraph results alongside other evidence to make informed decisions about further action, whether that involves referral to the police, internal disciplinary proceedings, or civil recovery action.

This structured approach ensures that the investigation is thorough, legally sound, and stands up to scrutiny from regulators and donors alike.

Legal and Ethical Considerations

Trustees commissioning polygraph tests must be mindful of legal and ethical obligations. In the UK, polygraph testing in the private and charitable sector is voluntary — no individual can be compelled to take a test. The testing must comply with data protection requirements under the Data Protection Act 2018 and UK GDPR.

Employment law considerations are also relevant. If the subject of a polygraph examination is an employee, trustees should ensure that the testing is conducted fairly, that the individual is informed of their rights, and that any adverse employment decision is based on the totality of available evidence rather than solely on polygraph results.

The Charity Commission's own guidance emphasises that trustees must act responsibly, reasonably, and honestly when investigating concerns. Commissioning a professional polygraph examination from a qualified examiner demonstrates exactly this kind of responsible, evidence-based approach.

For charities operating internationally, it is worth noting that polygraph use is more established and legally regulated in many countries. Russia has used polygraph interrogation in legal proceedings for over 15 years across government departments, while Lithuania has developed comprehensive legal frameworks for polygraph use in law enforcement. The UK's expanding statutory use of polygraph testing further demonstrates the growing acceptance of this technology in formal institutional settings.

Emerging Technologies and AI-Driven Threats

The fraud landscape is evolving rapidly, and charities must keep pace. Cyber-enabled fraud, phishing, and AI-driven threats are trustees' primary concerns for 2026, though they currently represent only 11% of detected cases. AI and deepfake technology are making traditional social engineering attacks — such as the classic CEO impersonation scam — significantly more difficult to detect.

About half of charities anticipate fraud risk will increase during 2026, reflecting the sector's awareness that new technologies create new vulnerabilities. The Crime and Policing Bill 2025 proposes to expand the scope of corporate attribution offences to all criminal offences, which could further increase the legal exposure of charities that fail to address fraud adequately.

In response to these evolving threats, deception detection technology is also advancing. Multimodal machine learning systems now integrate data from EEG, ECG, EOG, eye-gaze, galvanic skin response, audio, and video channels for improved fraud detection capabilities. Research into brain imaging techniques has demonstrated significant potential for forensic application, achieving 76-90% accuracy under controlled conditions, though practical deployment remains in development.

For charity trustees, the key takeaway is that proactive investment in fraud investigation capabilities — including professional polygraph testing — is increasingly essential. Waiting until fraud is discovered is too late; the most effective approach combines robust prevention measures with rapid, professional investigation tools when concerns arise.

Building a Fraud-Resilient Charity

The Charity Commission's strategy for dealing with fraud emphasises a four-strand approach with a clear emphasis on prevention. Charities can build resilience by strengthening financial controls such as segregation of duties and dual authorisation for payments; increasing fraud awareness training for all staff, volunteers, and trustees; establishing clear fraud response plans that include access to professional investigation tools including polygraph testing; and fostering a culture of transparency where concerns can be raised safely.

Ethical considerations around honesty and integrity are foundational to the charitable sector. For a deeper exploration of the moral dimensions of deception, our article on whether lying is a sin examines religious, ethical, and philosophical perspectives.

Whether you are a trustee dealing with a suspected fraud, a donor concerned about how your contributions are being used, or a charity professional seeking to strengthen your organisation's fraud defences, professional polygraph testing offers a proven, confidential, and scientifically grounded approach to uncovering the truth. Contact us to discuss how polygraph testing can support your charity's governance and accountability objectives, or explore polygraph test locations across the UK.