The Court of Appeal has delivered what is likely to become one of the most significant AML judgments in recent years, refusing a solicitor’s application to appeal his conviction for “tipping off” a client during a Serious Fraud Office (SFO) investigation.
While the case centres on a solicitor, its significance reaches beyond the legal profession. As the first Court of Appeal decision interpreting section 333A(3) of the Proceeds of Crime Act 2002 (POCA), the ruling establishes a precedent for every business operating within the UK’s regulated sector.
The judgment provides judicial guidance on what constitutes unlawful tipping off, confirms how broadly the offence can apply, and reinforces the expectation that firms must treat confidential requests from law enforcement very carefully.
A landmark first for the courts
The case, R v William Osmond, involves the first solicitor prosecuted for a tipping-off offence under POCA.
William Osmond, a senior partner and money laundering reporting officer (MLRO) at his firm, was convicted after informing a client that the SFO had made confidential enquiries during a money laundering investigation connected to the purchase of an £8 million London property.
The SFO had instructed Osmond that its request for information was confidential and warned him that disclosing it could amount to the criminal offence of tipping off.
Despite those warnings, he contacted the client immediately and continued discussing the investigation over several months, including meetings overseas.
Having been convicted in 2023 and given a suspended prison sentence, Osmond sought to overturn his conviction by arguing that the trial judge had improperly prevented certain issues from being considered by the jury.
The Court of Appeal rejected every ground of appeal.
The judges recognised the wider significance of the case by granting permission for the judgment itself to be cited in future proceedings, making it the leading appellate authority on that section of POCA.
The Court clarifies how the tipping-off offence works
Perhaps the most important aspect of the judgment is that it settles several legal questions that had never previously been considered by the Court of Appeal.
One of the central arguments advanced by the defence was that the confidential information came from the SFO rather than through work carried out in the regulated sector. The Court rejected that interpretation.
It held that because Osmond received the information in his professional capacity as a solicitor acting on the client’s transaction, the disclosure clearly fell within the scope of POCA. The fact that the transaction itself had taken place several years earlier made no difference.
The judgment also rejected another important defence argument, that prosecutors had to prove the investigation had actually been prejudiced.
Instead, the Court confirmed that the offence only requires the disclosure to be likely to prejudice an investigation.
In practice, the judges observed, telling the target of a covert money laundering investigation that investigators are making enquiries is inherently likely to prejudice that investigation because it creates the risk that evidence could be destroyed, altered or concealed, or that suspects could evade law enforcement.
That clarification significantly strengthens prosecutors’ ability to pursue tipping-off cases without needing to demonstrate actual harm.
Not just a solicitor’s issue
Although the defendant was a solicitor, this is not simply a legal profession case.
This section of POCA applies across the UK’s regulated sector, meaning the judgment is relevant to banks, accountants, estate agents, trust and company service providers, insolvency practitioners, casinos, cryptoasset firms, and many other businesses subject to the Money Laundering Regulations.
Any organisation that receives confidential enquiries from the SFO, the National Crime Agency, the police or other investigating authorities should pay attention.
The ruling reinforces that tipping off is not limited to deliberately helping a criminal avoid detection. Simply revealing that an investigation exists or providing enough information for someone to infer that enquiries are underway, may be enough if the disclosure is likely to prejudice the investigation.
What should UK businesses do now?
For compliance teams, the case indicates that confidentiality obligations extend beyond submitting Suspicious Activity Reports.
Staff who interact with law enforcement requests, production orders or confidential enquiries must understand that seemingly routine communications with customers or clients can create criminal liability.
The judgment also highlights the importance of strong internal escalation procedures. Employees should know exactly who is authorised to communicate with investigators, who may speak to customers where investigations are ongoing, and when legal or compliance advice must be sought before responding.
Training is equally critical. While many firms devote considerable attention to customer due diligence and sanctions screening, tipping-off risks often receive comparatively little practical focus despite carrying criminal consequences for individuals.
This decision suggests regulators and prosecutors may now have greater confidence in bringing similar cases where confidential investigations are compromised.
A precedent for future AML enforcement?
By providing the first authoritative interpretation of Section 333A(3), the Court of Appeal establishes a judicial roadmap for future prosecutions and removes uncertainty around several key aspects of the offence.
Because the Court expressly authorised the judgment to be cited in future cases, it will almost certainly become a leading authority whenever tipping-off offences are considered.
Confidential enquiries from investigators must remain confidential. For firms within the scope of POCA, the courts have confirmed that the threshold for criminal liability is broader than some may have assumed, and businesses cannot rely on arguments that no actual prejudice occurred or that information originated from investigators rather than client work.
As enforcement against financial crime continues to intensify, organisations should treat this ruling as an opportunity to review their AML policies, reinforce staff training and ensure that everyone handling sensitive investigations understands precisely where the legal boundaries lie.
