The fetch can send up a beacon to the Others, usually as a last resort. The Fae might choose not to respond, but then again, they might jump at the chance to reclaim a servant (possibly gaining an edge over an adversary). The fetch spends 10 points of Glamour (only five required in the Hedge) and screams, rings a bell or otherwise makes a loud noise. The True Fae hear the call, though if and how they respond is up to the Storyteller.