You must inform the municipality of your change of address anywhere between 4 weeks prior to moving and 5 days after moving. The moving date that you provide will be treated as the day on which your address changed. If you inform the municipality more than 5 days after moving, the date on which you inform the municipality will be treated as the moving date. Municipalities can impose a fine of up to €325 if you do not inform them in time of important changes to your personal information.