P.R. Laws tit. 31, § 3173
2019-02-20 00:00:00+00
Unless the contract expressly authorizes it the creditor cannot be compelled to partially receive the prestations of which the obligation consists.
However, should the debt be in part determined and in part undetermined, the creditor may exact and the debtor may make payment of the former without awaiting for the liquidation of the latter.
History —Civil Code, 1930, § 1123.