The process of obtaining a family-based via begins with the filing of the petition. Once the petition is approved, the case is referred to the National Visa Centre where all of the necessary documents will be collected in order for the case to be referred to the consulate. Those documents include the affidavit of support, DS-260, immigration application, immigration visa application, civil documents (original birth certificate or naturalization certificate) and police clearance showing that the person doesn’t have a criminal background. Once the National Visa Centre has received all of those documents, the case is referred to the consulate for an interview.