Del. Code tit. 13, § 108

Clerks of the peace shall issue marriage licenses for $10 each, $4.00 of which shall be deposited by the clerks of the peace with the Department of Health and Social Services for each license delivered to the various clerks of the peace to defray the costs of the various forms and certificates required by this chapter. No charge shall be made for investigation to establish the validity of any papers required of certain applicants for marriage licenses under this chapter, nor shall any person in this State make any charge for the execution of any papers required under this chapter, except that this shall not be construed to prohibit a charge for the execution of any affidavits that are required under this chapter, and except that a charge may be made for the marriage license as provided in this chapter.