S. An applicant's application might be denied if they don't include proof of their financial status, like bank statements or letters of sponsorship. Also, consular offslots online españaicials might consider it a warning sign if the financial sources seem dubious or unconfirmable. The applicant's lack of close ties to their home country is a major factor in F1 visa denials. It is the responsibility of consular officials to make sure that applicants do not plan to overstay their visas or enter the country illegally.