Every applicant for qualification of real estate syndicate securities under this chapter shall file with the chairman of the commission, in such form as it by regulation prescribes, an irrevocable consent appointing the chairman of the commission or his successor in office to be his attorney to receive service of any lawful process in any noncriminal suit, action or proceeding against him or his successor, executor or administrator, which arises under this chapter or any regulation or order promulgated hereunder after the consent has been filed, with the same force and validity as if served personally on the person filing the consent. Service may be made by leaving a copy of the process in the office of the commission but it is not effective unless the plaintiff, who may be the commission in a suit, action or proceeding instituted by it, forthwith sends notice of the service and a copy of the process by registered or certified mail to the defendant or respondent at his last address on file with the commission, and the plaintiff’s affidavit of compliance with this section is filed in the case on or before the return day of the process, if any, or within such further time as the court allows.