It is possible to prepay rent, i.e. pay before the due date for the next invoice.

When you pay the next invoice you may increase the amount up to the sum you want to pay. The amount that exceeds the monthly rent is then registered as a prepayment.

Even if you have prepaid some rent you will continue to receive an invoice for rent as usual, but the amount will be at NOK 0, - until the prepayment is spent.