What about the law and 4-FA?

In the Netherlands, 4-FA did not fall under the Opium Act until May 25, 2017. If you were caught by security or police, you were therefore not legally punishable. As of May 25, 2017, 4-FA is on list I of the Opium Act and possession and trade of 4-FA is punishable. It is therefore just as illegal as MDMA, for example.