Exile

"Don't ever presume to touch me again or speak my name. You have until dusk to collect your things and leave this city. If you are found in Meereen past break of day, I'll have your head thrown into Slaver's Bay. Go...now."

- Daenerys Targaryen exiles Ser Jorah Mormont from Meereen.

Exile, or banishment is an act of punishment exacted upon those who have committed crimes against those they serve. Criminals or outlaws can be exiled if they have committed a crime which the lord or king they serve deem heinous. The punishment involves one being sent away from their homes and threatened with imprisonment or execution if they return.

However, exile can also be a form of solitude or fleeing from a potential threat, as was the case with Viserys Targaryen and Daenerys Targaryen after Robert's Rebellion.

When a citizen from Westeros is banished, they are usually exiled to either the Wall, or Essos.

Known exiles

 * {Viserys} and Daenerys Targaryen were forced into exile after House Targaryen was overthrown in Robert's Rebellion.
 * Ser Jorah Mormont was forced into exile twice; first, he was forced to flee Westeros for selling poachers into slavery, and later he was banished by Daenerys after learning he spied on her for {Robert Baratheon} before switching his allegiance to her.
 * Melisandre is banished from the North by Jon Snow after she admits her role in the death of {Shireen Baratheon}.
 * Asher Forrester was exiled to Essos by his father {Gregor Forrester} in order to avoid war with House Whitehill after Asher fell in love with Gwyn Whitehill, daughter of Lord Ludd Whitehill.

Quotes
"As for the Mad King's surviving heirs...those that were able to scurry away in the face of my fury now live somewhere across the Narrow Sea. They had best stay there. If they ever set foot in Westeros again, they will face the King's justice."

- Robert Baratheon vows to have Viserys and Daenerys Targaryen killed if they ever return.

"Ride south today. If you return to the North, I'll have you hanged as a murderer."

- Jon Snow banishes Melisandre from the North.