Typically, we have found that mistakes are made with the show paperwork.  This is usually because the person filling out the paperwork is not a field person, and does not have time to make themselves into a paperwork expert for each and every show.  They tend to fill out each upcoming set of show paperwork almost identically to a past shows paperwork.  However, rules, including services and time frames change from venue to venue, so your paperwork strategy should change as well.  On average these small mistakes cost you the customer 10% - 15