When importing Dutch zip code data from an excel sheet into mapppoint, the program removes the two characters from it. Thus leaving you with more customers on 1 location.

Does anybody know how to solve this ?

ik zou het niet direct weten

but do you work with standaard mapPoint or did you develop your own application?

Mappoint Postal codes in the Netherlands only contain 4 digits. That's the only thing the program understands internally (and is able to display). But even without that, you would still have a problem since it's possible to have two customers that have the same full postal code (1011AA), only a different housenumber. What is it that you try to do?

Pascal