ORDERED that the order is modified by (1) deleting the first decretal paragraph thereof confirming the recommendation of the Special Referee in the first report that the petitioner had the burden of proof on the issue of its standing to bring the proceeding, and substituting therefor a provision granting that branch of the motion which was to reject that recommendation, and (2) deleting the sixth, eighth, ninth, thirteenth, and sixteenth decretal paragraphs thereof confirming certain recommendations of the Special Referee in the third report, and substituting therefor a provision granting that branch of the motion which was to reject those recommendations; as so modified, the order is affirmed insofar as appealed from, with costs to the petitioner payable by the respondents personally.
The Surrogate's Court erred in confirming the recommendation of the Special Referee in the first report that the petitioner had the burden of proof on the issue of its standing to bring the proceeding. When a petitioner's standing to bring a proceeding is challenged, either in an affirmative defense or a motion to dismiss (see, Matter of Fossella v. Dinkins, 66 N.Y.2d 162, 167; Noble v. Ambrosio, 173 A.D.2d 801), the respondent bears the burden of proof (see, Martin v. Edwards Labs., 60 N.Y.2d 417, 428; Matter of Blostein v. Bauer, 218 A.D.2d 912; Brignoli v. Balch, Hardy Scheinman, 178 A.D.2d 290; Kramer v. City of New York, 173 A.D.2d 155).
The Surrogate's Court properly confirmed the recommendation of the Special Referee in the third report that the petitioner be required to post a bond (see, Matter of Goldman, 150 A.D.2d 267; Matter of Milbank, 49 A.D.2d 848). However, the Surrogate's Court erred in requiring the petitioner to submit certified cash flow statements and in prohibiting the petitioner from further mortgaging its property, as in doing so the court exceeded its jurisdiction. While the Surrogate's Court may examine the needs of a beneficiary in connection with a request for an immediate distribution from an estate (see, SCPA 2102), the court may not inject itself into controversies that have no effect upon the estate itself (see, Matter of Piccione, 57 N.Y.2d 278, 289-290).
The Surrogate's Court erred in amending the petition by adding Machne Israel (hereinafter Machne) and Merkos L'Inyonei Chinuch (hereinafter Merkos) as necessary parties. "[The] power of the Surrogate's Court relates to matters affecting estates of decedents and not to independent matters involving controversies between living persons" (Matter of Lainez, 79 A.D.2d 78, 80, affd 55 N.Y.2d 657). Machne and Merkos allegedly have a claim against the petitioner pursuant to an agreement with the petitioner. However, the Surrogate's Court lacks jurisdiction over claims by creditors against distributees or legatees of an estate (see, Matter of Thompson, 184 N.Y. 36, 44-45; Matter of Piccione, supra, at 289; Matter of Lainez, supra, at 80).