Moving within the Netherlands
When you move from a different municipality in the Netherlands to Groningen or move within Groningen, you still need to register your new address within 5 days.
Registering at the municipality
If you are moving to Groningen from abroad, you need to register at the municipality within 5 days after your arrival. Registration is necessary, because you only receive a citizen service number (BSN) when you are officially registered. You need a BSN to study or work in the Netherlands. You also need a BSN to make use of all other official matters, such as healthcare, insurance, a bank account and to apply for benefits or an allowance. In some cases, the International Welcome Center North might be able to help you go through this process.
Registering for a short stay
Even if you are going to live, study or work in Groningen for less than four months, you need to get registered at the municipality as a non-resident. When registered, you will get a citizen service number (BSN). You will need a BSN as an employee and as a student, but you also require a BSN for all official matters such as healthcare, insurance or a bank account.
Citizen service number (BSN)
Read more about the Dutch citizen service number (BSN) on I Am Expat.