Nothing to worry just file a suit for declaration or suit for specific performance. Get it decreed ex-parte by issuing a paper publication There after during the course of execution it can be executed by the Court Commissioner. The relevant rule is as follows.
ORDER 26 RULE 10B OF CIVIL PROCEDURE CODE
Commission for performance of a ministerial act.- (1) Where any question arising in a suit involves the performance of any ministerial act which cannot, in the opinion of the court, be conveniently performed before the court, the court may, if, for reasons to be recorded, it is of opinion that it is necessary or expedient in the interests of justice so to do, issue a commission to such person as it thinks fit, directing him to perform that ministerial act and report thereon to the court.
(2) The provisions of rule 10 of this Order shall apply in relation to a Commissioner appointed under this rule as they apply in relation to a Commissioner appointed under rule 9.