De or het incassobemiddeling?

The correct Dutch article is:

de incassobemiddeling

Rule Words ending in -ing: almost always de. See the rule

How to use incassobemiddeling

the incassobemiddelingde incassobemiddeling
this incassobemiddelingdeze incassobemiddeling
that incassobemiddelingdie incassobemiddeling
our incassobemiddelingonze incassobemiddeling
your incassobemiddelingjouw incassobemiddeling
every incassobemiddelingelke incassobemiddeling
which incassobemiddeling?welke incassobemiddeling?
a big incassobemiddeling / the big incassobemiddelingeen grote incassobemiddeling, de grote incassobemiddeling