Yes. Excursion certificate transferred automatically. I had to pay by credit card the small amount more than the $100 allowance when I booked the waitlist tour. Worked very easily. If you did not book an alternative tour and booking still shows available certificate, it will be used automatically. If waitlist does not clear before departure, be sure to check for last minute cancellations with. Shore excursion desk. They have always been very helpful. Any available excursion allowance will stay in your account can be used on board.