first name, birthdate, country/region code to allow for regional variations. Would make a nice exercise in fuzzy decision processes, but I suspect it isn't a g

first name, birthdate, country/region code to allow for regional variations. Would make a nice exercise in fuzzy decision processes, but I suspect it isn't a great idea: you'd be better off leaving that field as "unknown" by default and writing "Dear Sir/Madam" if it is unknown.