I have a problem with my h1b application here, my h1b applicaton was sent to the processing center about one week ago via USPS express mail, but the tracking number did not show it was ever delivered, I called USPS they said they are not sure wheather it was delivered but the information did not get updated, or the package was lost on the way, as of now, I did not receive the receipt number, and the check was not cashed, I am thinking about sending another set of documents to the processing center, could you let me know if the processing center has two identical petitions, will this be a problem? your suggestion will be greatly appreciated.