The I-94 is a legal document. It is required: 

  • When applying for your Social Security Number 
  • When applying for health insurance 
  • When applying for a driver’s license 
  • When applying for an extension of stay 
  • It establishes your legal presence in the United States  
  • If your presence is questioned this document becomes necessary 
  • This document must be kept in your wallet or purse at all times.