Sometimes the USCIS is not convinced that the foreign national petitioning under an EB-1(a) category has adequately proven that he qualifies for the EB-1(a) category. In such cases they will issue “Request for Additional Evidence”. We always strive to present the strongest case possible so that it will be approved without a request for additional evidence. Nevertheless, there is no way to predict how a particular USCIS officer reviewing a particular case will respond; sometimes even a very strong case will receive a “Request for Additional Evidence”.