13 Del. C. § 404

(a) Upon the commencement of the income withholding, the obligor shall be notified that the withholding has commenced and of the procedures to follow if the obligor desires to contest such withholding on the grounds that the withholding or the amount withheld is improper due to a mistake of fact. This notice shall be in conformity with that required under § 513(b)(2) of this title; provided, however, that the notice shall also advise the obligor that the income withholding was requested on the basis of a support order of another jurisdiction. The date of serving notice on the obligor shall be the basis for measuring time for the obligor to file an affidavit in opposition to the attachment and for holding a hearing and rendering a decision.

(b) Section 513(b)(3) of this title shall apply if the obligor seeks to contest the proposed income withholding; provided, however, that if a hearing is scheduled the Court shall immediately notify the requesting agency of the date, time and place of the hearing and of the obligee’s right to attend the hearing.