To give CSS ex parte notice, contact the Legal Department at 866.901.3212. Give the person answering your call your name and phone number, the case name, court case number, CSS file number, the general nature of the ex parte request, the department the ex parte is set in and the date and time of the hearing. When you appear in the calendar department for the ex parte hearing, you should inform the Court that CSS is enforcing the case and the case will be assigned to a IV-D courtroom.