What document does Cleo receive before returning to the United States in Outer Banks season 5?

Cleo receives a naturalization certificate before returning to the United States in Outer Banks season 5. The document confirms her new citizenship status after Pope helps resolve her immigration situation.

Cleo is deported to Nassau in episode 9 and resumes working on boats there. During the hurricane, she and Pope discuss whether he should come to the Bahamas, but their call is interrupted. After the Pogues recover the Royal Merchant gold, Pope travels to the Bahamas and proposes again.

The finale then shows Cleo with her naturalization certificate celebrating with the Heyward family. It is not a passport or a temporary visa. The document marks a major change for Cleo, who began the series in survival mode and ends with a stable future alongside Pope.