Hello Im new to Chanel and I just got my first Chanel brooch at the boutique today. It was the last display piece and I love it so much that I refused to be placed on the waiting list. However, when I opened the box after reaching home, I realised that there is no tag anywhere in the box. Can any kind soul please tell me if the tag is essential? What is it for? Everything else (dust bag, box etc) is ok..Thanks!