Deciding in the end that it was better to become part of Europe than to stand alone, Spain finally accepted the Treaty on 7 May 1817; however, Olivença and its surroundings were never returned to Portuguese control and this question remains unresolved.
Lõppude lõpuks oli parem kuuluda Euroopasse kui olla üksi ja Hispaania nõustus 7. mail 1817 lõpuks lepinguga; siiski ei antud Olivenzat kunagi Portugalile tagasi ja see küsimus on siiani lahendamata.