If you are not the person who was subpoenaed then you have nothing to worry about. You don't need to do anything further. In other words, if you were handed a subpoena for John Smith and you are not John Smith, and never have been John Smith, you don't have to do anything. However, if you are contending that you were not served because your name is "Jon" Smith, and not "John" Smith, or something like that, you would be best advised not to do anything other than appear as subpoenaed. Good luck.
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