I submitted my application on the 7th of october 2017 and till now i haven't gotten my receipt number and its 25th of october 2017 . I called the uscis and i was inform its suppose to come to the mail after . I noticed my mailbox is been tampered with so i went to the post office to put a hold on my mail so they can hold the mail i get from uscis in the post office but been there severally they told me they didnt see any mail or they not sure if the mail from uscis was returned. And my i-94 will expire on the 25th of october . So has any one gone through this before? Please i will appreciate any response from anyone with useful information.