White collar crimes like tax evasion, bribery, and corruption are often concealed through complex legal structures and financial transactions facilitated by lawyers, accountants, financial institutions and other "professional enablers" of such crimes. These crimes have significant impacts on government revenue, public confidence and economic growth, including the recovery from COVID-19. This report sets out a range of strategies and actions for countries to take to tackle professional intermediaries who enable tax evasion and other financial crimes on behalf of their criminal clients. The report highlights the damaging role played by these intermediaries and the importance of concerted domestic and international action in clamping down on the enablers of crime, and includes recommended counter-strategies for deterring, disrupting, investigating and prosecuting the professionals who enable tax and white collar crimes.