Where the address of a defender is not known to the pursuer, an inhibition on the dependence shall be deemed to have been served on the defender if the schedule of inhibition is left with or deposited at the office of the sheriff clerk of the sheriff court district where the defender's last known address is located.

Where service of an inhibition on the dependence is executed under paragraph (1), a copy of the schedule of inhibition shall be sent by the sheriff officer by first class post to the defender's last known address.