These attorneys can assist applicants to get their US visas. While not mandatory for visa applications, they often help applicants looking for visas for under different visa categories. They can assist in the preparation and filing of all applications to be submitted to the USCIS and the US. Department of States. They are lawyers that specialize and are experts in all aspects of the immigration laws of the country and assist applicants earn their desired visas. You are not obliged to use an Attorney, but the help they provide in the preparation and filing of applications can make the whole process of dealing with the USCIS much easier for applicants.