This is the way to ensure that you get the your full 15% shareholder discount when using the half board plus vouchers.
Tell your CM that you are using board plus vouchers when you are seated, they will make sure you get the correct menu and let you know if you have accidently ordered anything off the voucher menu.
When you ask for the bill make sure you give your CM your lovely shinny gold shareholder card, they will then generate your bill with the 15% discount.
Then when you pay hand over the vouchers. That way the discount is taken off the whole bill and not after the cost of the vouchers have been taken off.
Our CM at Cafe Mickey told us this tip.
When we ate at Walts on the last day of our trip we had the same CM, Ross that served us at the Blue Lagoon a few days before. Ross recognised us as shareholders and brought us a half bottle of Champaign . A very nice touch.