Hello R BUCK,
HAL has a "Tipping not required" policy. But they do go on to say that you are free to extend monetary recognition.
HAL does not have automatic tips added. Same is true for bartenders etc, where other lines automatic add 15% to bar bills. I just have $1 bills with me for room service, bartenders and others.
As for the cabin steward, waiter and assistant waiter I tip on the last night, but you need to bring your own envelops or request them from guest relations/pusers desk. They will not have anything written on them as other cruise lines, as WAITER and so on.
Hope that helps,
Tuesday West Coast