I have talked to many students who say that it is difficult in their countries to obtain the I-20 and admissions letter. Here are some tips on how many students have overcome these difficulties. It is also wise to have with you any documents that describe the U.S. college you plan to join. Also, some visa clerks will ask to see recent photos of the applicant for a visa. It is not possible to list all the possible documents that can influence a visa clerk to grant your visa.
Circumstances vary from country to country, from embassy to embassy, and from student to student.
Just remember that there is no such thing as too much supporting documentation. What You Might Be Asked The purpose of the visa interview is to give the consular official a chance to determine if you are a legitimate college student who will return to your home country when your American studies are completed. At some U.S. embassies you may be asked to show proof that you have prepaid your school fees for at least one year. Unfortunately, not all colleges permit prepayment of school fees. If you are requested to show proof of payment, then what I suggest is that you have a certified check made out jointly to the school and to you for the approximate amount of the first year's fees.