De or het ticketvalidatie?

The correct Dutch article is:

de ticketvalidatie

Rule Words ending in -tie and -sie: almost always de. See the rule

This word is not in the word lists we use to double-check answers.

How to use ticketvalidatie

the ticketvalidatiede ticketvalidatie
this ticketvalidatiedeze ticketvalidatie
that ticketvalidatiedie ticketvalidatie
our ticketvalidatieonze ticketvalidatie
your ticketvalidatiejouw ticketvalidatie
every ticketvalidatieelke ticketvalidatie
which ticketvalidatie?welke ticketvalidatie?
a big ticketvalidatie / the big ticketvalidatieeen grote ticketvalidatie, de grote ticketvalidatie