P.R. Laws tit. 19, § 2386
(a) Applicable rules if amount of deficiency or surplus in issue.— In an action arising from a transaction, including a consumer transaction, in which the amount of a deficiency or surplus is in issue, the following rules apply:
(1) A secured party need not prove compliance with the provisions of this subchapter relating to collection, enforcement, disposition, or acceptance unless the debtor or a secondary obligor places the secured party's compliance in its petition, answer, or in connection with a motion for summary judgment.
(2) If the secured party's noncompliance is pleaded, the secured party has the burden of establishing that the collection, enforcement, disposition, or acceptance was conducted in accordance with this subchapter.
(3) Except as otherwise provided in § 2388 of this title, if a secured party fails to prove that the collection, enforcement, disposition, or acceptance was conducted in accordance with the provisions of this subchapter relating to collection, enforcement, disposition, or acceptance, the liability of a debtor or a secondary obligor for a deficiency is limited to an amount by which the sum of the secured obligation, expenses, and attorney's fees exceeds the greater of:
(A) The proceeds of the collection, enforcement, disposition, or acceptance, or
(B) the amount of proceeds that would have been realized had the noncomplying secured party proceeded in accordance with the provisions of this subchapter relating to collection, enforcement, disposition, or acceptance.
(4) For purposes of clause (3)(B) of this subsection, in a consumer transaction the amount of proceeds that would have been realized is equal to the sum of the secured obligation, expenses, and attorney's fees unless the secured party proves that the amount is less than that sum.
(5) If a deficiency or surplus is calculated under § 2375(f) of this title, the debtor or obligor has the burden of establishing that the amount of proceeds of the disposition is significantly below the range of prices that a complying disposition to a person other than the secured party, a person related to the secured party, or a secondary obligor would have brought.
History —Sept. 19, 1996, No. 241, added as § 9-626 on Jan. 17, 2012, No. 21, § 11, eff. 1 year after Jan. 17, 2012.