As part of the application for pre-visa documents I-20 or DS-2019, International Students and Scholars Services is required to verify that the student has sufficient financial support to pay for the first year of study. This is done by reviewing documents that demonstrate ability to do so. These documents may be: scholarship letters, bank statements, or other such documents. The amount of proof a student must show before they are issued their pre-visa document depends upon the varying cost of their program.