Under the laws of all states in this country if one's purported signature on a document is not the person whose name it is and was signed by a person who does not have the authority to do so then the document has no legal and binding effect due to the signature being "forged".As such, the document that has your name on it that was not signed by you is not binding on you. I suggest that you consult with an attorney about the matter you are writing about to see what legal recourse you have as to invalidating the coverage that your carrier has bound you to improperly.