If you are moving abroad for more than 8 months, you must deregister from the municipality. You can deregister in two ways: online or at the municipality. Your departure from the Netherlands can only be done online if all residents of the address move abroad at the same time. If you live with several other people on the same address and not everyone is moving abroad, then only the persons that are moving with you need to come to the municipality personally. This also applies to children under the age of 18.