If you are applying for an academic program, the visa is called F-1.
Mail all materials to: International Student Program 1113 South 14th Avenue Yakima, WA 98902 Email scanned documents to email@example.com Mail check or money orders for the application can be sent to: Yakima Valley College (Attention: Cashier's Office) P.O. Box 22520 Yakima, WA 98907 Include a note with the following information: First & Last Name and a note that it is for the "International Student" application fee.
This is a document issued upon completion of the admissions process. It is an immigration document issued by Yakima Valley College which you present to the embassy in applying for your visa. The I-20 signifies that you have been accepted to an institution in the US.