P.R. Laws Ap. tit. 34A, § II, Rule 232
The search warrant shall be executed and returned, only within ten (10) days of its issuance. The officer executing it shall give to the person from whom the property was taken, or in whose possession it was found, a copy of the warrant and a receipt for the property taken, or shall leave such copy and receipt at the place from which the property was taken. The return shall be accompanied by a written inventory of any property taken which shall be made in the presence of both the applicant for the warrant and the person from whose possession or premises the property was taken, if they are present; and if any of them is not present, in the presence of at least one creditable person. The inventory shall be verified by the officer. The magistrate shall, upon request, deliver a copy of the inventory to the applicant for the warrant or to the person from whom the property was taken.