If you are leaving the country for more than 8 months, you must deregister with the municipality. You can do this in several ways: online or at city hall. You can only report your departure from the Netherlands online if all residents of the address are emigrating at the same time. If you live with other people at the same address and not everyone is moving with you, everyone who is moving with you must visit the municipal office in person. This also applies to children under the age of 18.