When any such original process is served upon any county clerk as herein provided, he shall forthwith notify the person or persons upon whom service is intended to be made through him by letter directed to the post-office address given in the certificate and shall, within two days after such service, forward to such person or persons, in the same manner, a copy of the process served on him and such service shall be deemed sufficient service upon such person or persons. The county clerk shall keep a record of all such processes showing the day and hour of such service.
N.J.S. § 56:1-2.2