We hear this misconception a lot! In fact, to bid at an auction or for your bid to be received by the auctioneer, you typically need a bid paddle or bid card. You will receive this bid paddle or card at registration and it will have a number on it. This number allows the auction company to know who is bidding from the list of registered bidders.
If you mistakenly bid or the auctioneer misinterprets your movement as a bid, immediately notify either the auctioneer or their staff.