(c) Service under (a) or (b) of this section may be made by providing a copy of the process to the office of the administrator, but the service is not effective unless
- (1) the plaintiff, which may be the administrator, promptly sends notice of the service and a copy of the process, return receipt requested, to the defendant or respondent at the address set out in the consent to service of process or, if a consent to service of process has not been filed, at the last known address, or takes other reasonable steps to give notice; and
- (2) the plaintiff files an affidavit of compliance with this subsection in the action or proceeding on or before the return day of the process, if any, or within the time that the court, or the administrator in a proceeding before the administrator, allows.