In 1807, "Confiance" was part of Admiral Sidney Smith's fleet off Portugal. "Confiance" transported Percy Smythe, 6th Viscount Strangford to Lisbon to negotiate an alliance with Britain. Lord Strangford also negotiated the passage of the Portuguese Prince Regent Dom João and the Portuguese royal family to Brazil. Yeo was ordered by Admiral Smith to bring word of Strangford's success to Britain, an honour that led Yeo being named to the list of post-captains. Due to his rank, "Confiance" was reclassified as a post-ship. The following year, "Confiance" was part of Smith's fleet stationed off Brazil.