Resolution of the Sofia Appeals Court Civilian Ref. No. 277/2007 of 22 February 2007 (E.I.AD vs. O.tz.kAD):

Rationes Decidendi:

When a court has ascertained as part of enforcement proceedings that grounds exist for the enforcement of a judgment (arbitral award), the court must examine the party benefiting from the awarded right and the party against which such a right exists (right of action and suability).
A writ of execution may only be issued in favour of a party that is found to possess a right against a party that must submit to the enforcement of a judgment.
The enforcement of a judgment may be demanded by a person other than a party to arbitral proceedings, specifically, by a party that has been awarded a right under an arbitral award. Such a party, however, must demonstrate its legal succession regarding such a right, where the claimant is subject to the duty to submit evidence (burden of proof). A court examines such a legal succession in enforcement proceedings as part of the exercise of its official authority.