The Money Laundering, Terrorist Financing and Transfer of Funds (Information on the Payer) Regulations 2017 (Money Laundering Regulations 2017 or MLR 2017), SI 2017/692 came into force on 26 June 2017. The MLR 2017 replace the Money Laundering Regulations 2007, SI 2007/2157, and give effect to Directive (EU) 2015/849 on the prevention of the use of the financial system for the purposes of money laundering or terrorist financing (sometimes known as the Fourth Money Laundering Directive or MLD4) which took effect from 26 June 2017. This Practice Note considers the key provisions of MLR 2017 in so far as the regulations give rise to potential criminal liability. It sets out the offences under the MLR 2017 and sentences which can be imposed on conviction. It also summarises key regulator guidance on the MLR 2017 and introduces the oversight of non-statutory, professional body money laundering supervisors by the Office for Professional Body Anti-Money Laundering Supervision (OPBAS). The Practice Note incorporates amendments by various SIs including the Money Laundering and Terrorist Financing (Miscellaneous Amendments) Regulations 2018, SI 2018/1337 and the Money Laundering and Terrorist Financing (Amendment) Regulations 2019, SI 2019/1511, as well as the Money Laundering and Transfer of Funds (Information) (Amendment) (EU Exit) Regulations 2019, SI 2019/253 and the Money Laundering and Terrorist Financing (Amendment) (EU Exit) Regulations 2020, SI 2020/991.