An advisory referendum on the Intelligence and Security Services Act 2017 (Dutch: Wet op de inlichtingen- en veiligheidsdiensten 2017, abbreviated 'Wiv') was held in the Netherlands on 21 March 2018, alongside the municipal elections.

If voters who cast for ballots had instead refused to show up, the turnout of 27.5% would have been insufficient for the result to be declared valid.

[2] The draft Intelligence and Security Agencies Act 2017 was laid before the States General by the Government of the Netherlands at the end of 2016.

On 14 February 2017, a majority in the House of Representatives voted in support of the act,[3] which was then approved in the Senate on 11 July.

[4][5] A campaign to obtain sufficient support declarations for a referendum was initiated by a group of students at the University of Amsterdam concerned about the sweeping surveillance powers granted to the General Intelligence and Security Service (AIVD) under the law.