Returning equipment will be treated as an act of treachery.
For Light side to Dark, this will mean a Fal Dara and Maradon warrant.
For Human to Seanchan, it will be a Two Rivers, Bandar Eban, and Amador warrant.
For Seanchan to Human, it will be an Empire warrant.
For same side you will be warranted by your own jurisdiction if you have one, and the offended jurisdiction if you do not.
For Dark side to Light, this will mean a Shadow warrant.
This does not apply to scalps.