Nick it is no need to fret. Easy does it. Go to the Purser's Office (Reception) and tell them to deduct any amount you wish from your tip charges. Or you can increase if you wish. Now that is said. All charged tips are devided amoung all servers. So My suggestion is. Have all your tip charges removed and give envelopes to the person or persons you wish. They should cooperate. They have for me. Hope this helps.