So now that the wedding is done of course now comes the thank you's. I know the typical rule is if you plan on exchanging something you don't mention it in the thank you card. The issue is some pretty close family got us a 16 piece dinnerware set that we are not too fond of. They did include the gift receipt and it is from the same location as our registry so we were planing on exchanging it for another few place settings of the dishes we actually wanted. Should we mention this in the thank you since there is a fairly high change they will be over and seeing what dishes we are serving on?