P.R. Laws tit. 32, § 2361
The executor of the last will of a decedent, or in case that none has been appointed or if the decedent left no validly executed will, the surviving spouse of the decedent or any heirs at law or any person claiming as testamentary heir or legatee, or any unsecured creditor with written title, having a claim against the decedent, may, on a proper petition duly showing therein the necessary facts, apply for a judicial administration of the property of said decedent. Such petition shall be filed in the part of the Court of First Instance having jurisdiction over the last residence of the decedent or of the place where the greater part of his property is situated and shall set forth under oath:
(1) The death of the decedent.
(2) The particulars relating to his last will, including the date of the execution thereof and the office in which it was recorded; and in case such decedent shall have died intestate, it shall set forth that according to the best information and belief of the petitioner said decedent left no valid will, with the sources and grounds for such information and belief.
(3) The interest and cause of action of the petitioner.
(4) The names and respective residences of all other persons entitled to inherit in the estate of the decedent.
(5) That decedent left property subject to distribution, and the amount and nature of such property.
History —Code Civil Proc., 1933, § 556.