Service on a judgment debtor must be made in the same manner as a summons is served.
Cal. Code of Civ. Proc. section 684.110(a) provides in pertinent part: “Subject to subdivisions (b), (c), and (d), if a writ, notice, order, or other paper is required to be personally served under this title, service shall be made in the same manner as a summons is served under Chapter 4 (commencing with Section 413.10) of Title 5.”
A summons may be served on a corporation “to the person designated as agent for service of process,” or “to the president, chief executive officer, or other head of the corporation, a vice president, a secretary or assistant secretary, a treasurer or assistant treasurer, a controller or chief financial officer, a general manager, or a person authorized by the corporation to receive service of process.” See. Cal. Code of Civ. Proc. section 416.10(a) and (b).