If you are going abroad for longer than 8 months, you must deregister from the municipality. You can do this in different ways: online or at the town hall. Your departure from the Netherlands can only be reported online if all residents of the address are emigrating at the same time. If more than one person lives at the same address and not everyone is going with you, then everyone who is going with you must come to the municipality in person. This also applies to children under the age of 18.