On August 13, 1898, Spain ceded Puerto Rico to the United States as part of the Treaty of Paris, bringing the Puerto Rican Campaign to an end. The "Banco Español de Puerto Rico" was then transferred to invading investors. However, the terms signed in the armistice, stated that the United States would have to respect all the charters that were previously granted by Spain to its former colonies. This was certified by the United States Congress on June 6, 1900. Thus, the bank continued issuing provincial currency in Puerto Rico, but was renamed "El Banco de Puerto Rico" or Bank of Puerto Rico. The capital used by the currency was changed from "peso" to dollars, giving birth to the Puerto Rican dollar. A proposal to print 1-dollar banknotes was suggested, but refused citing that it could "bring dangerous results". Series C bills were issued with a release date of "May 1, 1900" and were overstamped with "Moneda Americana" in bold red letters. They bore the signatures of the new bank governor Carlos María Soler and cashier Manuel Vicente. This marked the first and only time that currency valorized in dollars was issued outside the United States.