The Solicitors Regulation Authority (SRA) has published a thematic review examining law firms' compliance with source of funds and wealth requirements under the Money Laundering, Terrorist Financing and Transfer of Funds (Information on the Payer) Regulations 2017 (MLR 2017). The review, based on three years of supervisory data and engagement with 19 firms, found that of more than 5,800 files reviewed in 2024-2025, 11% lacked source of funds checks and 18% showed inadequate scrutiny of evidence. In 8% of cases, the source of funds recorded in ledgers was not supported by collected evidence. The SRA identified challenges including inadequate document scrutiny, record-keeping issues, and firms collecting but not assessing evidence. The review highlights that 73% of suspicious activity reports submitted to the National Crime Agency related to conveyancing transactions. In response, the SRA has developed new resources including frequently asked questions, information gathering forms, case studies, and enforcement examples to support firms in conducting effective checks. The review sets out clear expectations for audit trails, ongoing monitoring obligations, and enhanced due diligence for high-risk matters, particularly emphasising that compliance requires understanding fund origins rather than merely collecting documentation.