Verification Information System
"The Verification Information System (VIS) is a Web-based application that queries an immigration database containing information on more than 60 million non-citizens.
"When a user agency submits a status verification request, the system provides the applicant's immigration status within seconds.
"The system also gives the user a way to submit additional information electronically to an Immigration Status Verifier (ISV) when further research is necessary."
- The ISV "conducts a search using additional immigration databases to determine the applicant's immigration status."