De or het schuldvordering?

The correct Dutch article is:

de schuldvordering

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

How to use schuldvordering

the schuldvorderingde schuldvordering
this schuldvorderingdeze schuldvordering
that schuldvorderingdie schuldvordering
our schuldvorderingonze schuldvordering
your schuldvorderingjouw schuldvordering
every schuldvorderingelke schuldvordering
which schuldvordering?welke schuldvordering?
a big schuldvordering / the big schuldvorderingeen grote schuldvordering, de grote schuldvordering