At our county fair quilt show, we put our labels on our quilts and then the label is covered with a piece of paper so the maker is not identified during the judging. After the judging is over the paper is removed so the maker is identified. But just in case I would check with the local judges or the local committee. I would definitely put a label on it and then cover it with another piece of fabric as someone else stated for sure, if you aren't sure about the rules.