What is CDD? Customer due diligence (CDD) is a package of measures which credit institutions (such as banks) and other financial institutions are required to apply to their customers to ensure, as far as practicable, that the financial system is used only by bona fide persons for bona fide purposes. CDD is also known as know your customer (KYC). In the UK, CDD requirements are set out in the Money Laundering, Terrorist Financing and Transfer of Funds (Information on the Payer) Regulations 2017, SI 2017/692 (2017 MLRs), which implement the Fourth Money Laundering Directive (EU) 2015/849 (MLD4) and the Second Wire Transfer Regulation (EU) 2015/847 (WTR2) in the UK and entered into force on 26 June 2017. The 2017 MLRs replaced the Money Laundering Regulations 2007, SI 2007/2157 (2007 MLRs), which implemented the Third Money Laundering Directive 2005/60/EC (MLD3) in the UK. When is CDD required? 2017