Registering at the local municipality is how one obtains a BSN. After the town hall registration visit, you will receive your personal public service number, either immediately or a certain period of time after. This depends on the municipality’s process flow. When a BSN is required, but your stay is less than 4 months, you will be able to apply for a BSN at one of the 19 municipalities which are authorized to register you in the Register Non Inhabitants (RNI). Should you extend your stay, you are required to change your registration at the town hall from non-resident to the status of long-stay-resident.