A model letter makes it easier to make your objections, wishes or demands known in an official way. You can adapt the text of each standard letter to your own situation. You remain responsible for the letter yourself.
– Dutch sample letter: Request for rent reduction
– Dutch sample letter: Objection to rent increase
– Dutch sample letter: Reclaim brokerage fees
– Dutch sample letter: Request split all-in rental price
– Dutch sample letter: Request for service charge statement
– Dutch sample letter: Request for a refund of service charges
There are many more Dutch sample letters. You can find them all on the website of Juridisch Loket.