P.R. Laws tit. 10, § 1302
Commercial contracts shall be valid and shall cause obligations and causes of action whatever may be the form and language in which they are executed, the class to which they belong, and the amount of the contract, provided their existence is shown by any of the means provided by civil law. However, the testimony of witnesses shall not in itself be sufficient to prove the existence of a contract the amount of which exceeds three hundred dollars ($300), unless such testimony concurs with other evidence.
Telegraphic correspondence shall cause obligations among such contracting parties as have used such means of contracting, provided the telegrams meet the conditions or contain such conventional signs as may have been previously agreed upon by the contracting parties, if such agreement was made; or provided the original telegrams contain the signatures of the persons transmitting them. In such cases as refer to securities, telegraphic correspondence shall not cause obligations, unless comprised in one of those two cases. With that exception, telegraphic correspondence shall also cause obligations when the aforementioned requisites are not met, provided it is proved to the satisfaction of the court that the original telegrams are left or caused to be left at the telegraph office by the persons transmitting them, although they may not appear to be signed by them.
Commercial contracts made orally by telephone, shall be valid and shall cause the consequences of verbal contracts.
History —Commerce Code, 1932, § 82.