Financial Intelligence Units (FIUs) are responsible for:

Financial Intelligence Units (FIUs) are national agencies that collect, analyze, and disseminate information on suspicious or unusual financial activity, such as money laundering and terrorist financing, to relevant authorities. One of their main functions is to disseminate the results of their analysis to law enforcement agencies in a timely manner, so that they can initiate investigations or prosecutions. This is also one of the standards set by the Financial Action Task Force (FATF), the global body that sets the anti-money laundering and counter-terrorist financing (AML/CFT) policies and recommendations. The other options are not the primary responsibilities of FIUs, although they may perform them as part of their mandate or in cooperation with other agencies.

What are Financial Intelligence Units (FIUs)? | Dow Jones

Financial Intelligence Units: An Overview - IMF

Financial Intelligence Units - Egmont Group

FATF Recommendation 29 - Financial Intelligence Units (page 17)