Ask here for to find out if your ship is participating in the auto-tip program. Someone who was very recently been on whatever ship you ask about is bound to be able to provide you with the current and proper answer. If the auto-tipping is not done then they will leave envelopes in your cabin near the end of the cruise. You may also obtain these envelopes at the Pursers desk. We personally prefer to tip in person with the envelopes and always have the auto-tips removed and tip with the envelope method. It's a personal thing and we like to reward personally.