The DNB (or De Nederlandsche Bank) is the Central Bank of the Netherlands. It supervises the stability of financial markets and ensures financial prosperity in the country.

The DNB is the supervisory authority responsible for crypto service providers. Since May 2020, they are subject to Anti-Money Laundering and Anti-Terrorist Financing Act to the Sanctions Act, requiring them to check their customers against Sanction Lists and also check incoming and outgoing transactions. Crypto services providers must also register with the DNB providing company information or a business plan for example.

DNB's website.