You just ask your TA to call in a shipboard credit on your credit card. One phone call is all it takes. It is like giving a gift to yourself. So you still get the points for using your card. This is done a lot as parents give gifts to kids things of that nature. It is a very common practice.

Also be sure to tell the Dining Room Manager it is your anniversary and special order whatever it is that you and your husband love to eat that night. It is a real treat to pre-order for a special dinner. Just be sure to give him 24 hours notice. Also make sure your TA or you fill in that it is your anniversary on your Guest Information forms.