Waterbedrijf Groningen is sending me letters addressed to someone else, what can I do?

Please return the letter(s) to:

PO box 24
9700 AA Groningen, the Netherlands

You should also check whether the water supply contract for your address is made out to the correct name. If you have not yet registered the address in question, you can do so at mijn.waterbedrijfgroningen.nl (in Dutch).