You could just give people a pin code. System could be set up so common spelling variations don't matter. Jon Smith 03/04/1973 Pin 349 Same as Jonathan Smith

You could just give people a pin code. System could be set up so common spelling variations don't matter. Jon Smith 03/04/1973 Pin 349 Same as Jonathan Smith 03/04/1973 Pin 349 Same as Johnny Smith 03/04/1973 Pin 349 However Jonathan Smith 03/04/1973 Pin 139 Is a different person.