De or het schuldvereffening?

The correct Dutch article is:

de schuldvereffening

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

How to use schuldvereffening

the schuldvereffeningde schuldvereffening
this schuldvereffeningdeze schuldvereffening
that schuldvereffeningdie schuldvereffening
our schuldvereffeningonze schuldvereffening
your schuldvereffeningjouw schuldvereffening
every schuldvereffeningelke schuldvereffening
which schuldvereffening?welke schuldvereffening?
a big schuldvereffening / the big schuldvereffeningeen grote schuldvereffening, de grote schuldvereffening