Back in 1997 my sister applied for Tourist Visa ( 1 ) and was refused it during the interview . The reason wasn't explained to her . All she got from the officer was a list of possible reasons for which a visitor visa could be denied . She is applying for the same visa type again and she has to answer " YES " to the following question : " Have you ever been refused a U . S . visa , been refused admission to the United states , or withdrawn your application for admission at the port of entry ? " Please suggest how to explain this situation in the application ( they ask to explain in the box when answering " Yes " ) if the reason for visa refusal / denial is unknown . Thank you .