What if I have an old and a new Melkweg membership or have to purchase an extra membership? In this case you can contact us. An employee will make sure to help you out. Related articles How to contact us (click here) How does the new Melkweg membership work? Why does Melkweg have a membership? How does the Melkweg membership work if I buy a ticket for others? When does my Melkweg membership period start?