P.R. Laws tit. 30, § 2607 : TITLE THIRTY Mortgage Law and Regulations —Subtitle 4 Mortgage and Property Registry Act of 1979; General Provisions —Chapter 119. Mortgages —Subchapter II. Voluntary Mortgages —§ 2607. Requirements for valid constitution
In order for voluntary mortgages to be validly constituted, it is required:
First.— That they be stipulated in a deed.
Second.— That the document be recorded in the Property Registry.