Delaware Code
Subchapter II. Landlord-Tenant Relationship
§ 7015. Delivery of written notice.

(a) Unless otherwise specified, notice required by this chapter may be served personally upon a tenant of a manufactured home community by leaving a copy of the notice at the tenant's dwelling place with an adult person who resides therein. Notice required under subchapters I through V of this chapter may be served personally upon a landlord or upon any other person in the employ of the landlord whose responsibility is to accept such service. If a landlord is a corporation, firm, unincorporated association, or other artificial entity, service of the notice may be made by leaving a copy of the notice at its office or place of business with an agent authorized to accept such notice or authorized by law to receive service of process. Service of notice or process may be obtained through personal service by a special process-server appointed by the court.
(b) In lieu of personal service, notice required under subchapters I through V of this chapter may be sent by regular first class mail with proof of mailing or by certified mail, return receipt requested, to the tenant at the address of the tenant's rented lot, or at an alternative address which the tenant provided in writing to the landlord. Notice required under subchapters I through V of this chapter may be sent by regular first class mail with proof of mailing or by certified mail, return receipt requested, to the landlord at the landlord's last known dwelling place or at the landlord's last known office or place of business. Proof of mailing regular first class mail on U.S. Postal Service Form 3817 or its successor, or a return receipt, signed or unsigned, for certified mail constitutes valid service of any notice required under subchapters I through V of this chapter.