P.R. Laws Ap. tit. 32A, § III, Rule 35.4
(a) A judgment by confession may be entered without action, based upon the defendant’s consent, either for money due or to become due, or to secure any person against contingent liability on behalf of the defendant, or both, in the manner prescribed by this rule. Such judgment shall be entered in the docket and notified by the clerk and will become final and unappealable at the date of entry.
(b) Such consent shall appear from a verified statement, signed by the defendant, to the following effect:
(1) It must authorize the entry of judgment for a specified sum.
(2) If it be for the purpose of securing the plaintiff against a contingent liability, it must state concisely the facts constituting the liability and show that the sum confessed therefor does not exceed the same.