If invoice is not paid within the due date, the invoice will be sent to debt collection.
Contact the debt collection agency you have received an invoice from if there is anything you are wondering about.
Here is the contact information for the different debt collection agencies:
Tlf: 33 45 60 90
Tlf: 22 03 60 05
If you have received debt collection from several companies, you can send a request to firstname.lastname@example.org