When creating a new customer for an Invoice - the last name cannot have a space in it - so for instance we cannot create a customer with the last name " Von Trapp". Clover support tried to tell me this was by design that back end banking systems don't support this (which I question very heavily because the First Name field allows for spaces) but even if that is the case they have to make the front end invoice support this because that invoice becomes a legal document so has to be able to display a customer's actual name.