Tickets And Guests
Each ticket that is sold should be associated with a single bidder record.
So, if you sell a couples ticket where the 'ticket per' is 2 then a single purchase of this item will result in two tickets and create two bidders, normally the purchaser and one guest. A bidder record is needed for each guest to allow extra information like meal choices and seating preferences to be tracked per guest.
Tickets are assigned to a bidder, and a bidder may have more than one. For example, if someone purchases a table of 8 but doesn't provide guest details then you can configure the system to either create placeholder 'Guest of ...' bidders or assign all 8 tickets to the purchaser and not create the extra bidder records yet.