5. USCIS Error – While this affects only a small number of applications, it does exist. By way of example, we had a client whose petition was filed many months ago. We heard nothing for some time, and then USCIS updated its website stating that it had sent us a letter requesting more evidence. We had never received a letter requesting more evidence so we immediately contacted USCIS asking for more information. About two weeks later, we received two letters in the mail on the same day from USCIS. The first stated that USCIS had made a mistake on its website and that there was not, and had never been, a letter requesting more evidence. The second letter was the letter from USCIS requesting more evidence! This was obviously an error on USCIS’s part. The good news is that were able to contact USCIS again and the petition has since been approved, but this USCIS error did cause some delays.