Dutch passport holders are not eligible for voluntary return assistance with IOM. In case you are willing to withdraw your Dutch nationality and meet all other conditions, IOM might be able to assist you. You can withdraw your Dutch nationality at the town hall of your residence.
Dutch residence permit holders must return their residence document to the closest Immigration and Naturalization Service counter before their departure from the Netherlands. You will retain your right of residence until your actual departure, so that you can still can change your mind about leaving the Netherlands without any consequences. After your departure took place, your right of residence will be revoked.