If you think narko, for a moment, you would relize 2 people can't have the same name at the same time. So if this 'impersonator' has the original name and it's spelled correctly That means that nobody else can have the exact same name are have likely spelled the name wrong (ex: Altier, or Alteier etc.) or have added numbers to it. (Ex: Altair153 or XxAltairxX etc.) Thus meaning that he is the original.