Del. Code Ann. tit. 13, § 2219
Each party shall receive written notice, which may be contained in the support judgment or order, that the party is required to keep the court informed of such party’s current residential address, drivers license number, telephone number, employer, employer address and employer telephone number.
71 Del. Laws, c. 216, § 1; 70 Del. Laws, c. 186, § 1; 84 Del. Laws, c. 42, § 1