[@Prince of Seraphs] Type, generally. There is a leniency for Fae Rulers having to surrender a vassal to another Court. Or the Wild Fae. Generally Fae will stay within their Court type, Seelie/UnSeelie, and even more will remain under their ruler if the ruler is a good one. Those that flee a disliked ruler or to a different Court will generally be turned back by the border Guard as they could be spies. Most of these will become Wild Fae, outcasts, outlaws, and if their Ruler takes it in mind they will be hunted down.

Your personal choice is not always a option to the Fae. Especially to move Courts. While it is done there is suspicion about it. ESPECIALLY for a Fall to Spring, Summer to Winter and vise versa. Your going to the absolute enemy, the utter betrayal of that would make you and your kin. UNLESS a Ruler ordered it, then there is more suspicion about what you did wrong, or if you're up to something for the Ruler that ordered it.