The word "Concorde" or "Concorde Card" can appear alongside your name, but it's a waste of space. Many staff haven't a clue what it means anyway, and in terms of the flight it doesn't really need to mean anything. It's a historical legacy prior to the development of Guest List. Similar for Prems. I've only peeked once, at the LCY Arrivals service, when they showed me and asked me what it meant.