You apply for a short stay visa to a Dutch representation abroad. You cannot apply for this to the IND.
Do you sponsor someone who wishes to come to the Netherlands for a short stay and you are married? Then both you and your spouse sign the proof of sponsorship.
You can sponsor multiple persons. You then fill in a separate form 'Proof of Sponsorship and/or private accommodation' for each person.
Has your application for a short stay visa been rejected? Then you You can apply for a review of this decision. The address is:
P.O. Box 2
9560 AA TER APEL