SB1 resident visa is for a permanent resident returning to the US from a visit abroad of more than one year. The applicant must have stayed outside of the US due to emergency or extraordinary circumstances that prevented the permanent resident from being able return to the US within the required one year period.
Examples of emergency or extraordinary circumstances would if a SB1 resident visa applicant had been seriously injured in a car wreck, required to work outside the US by employer or kidnapped by terrorists. Applicants must be able to document their specific reason for their extended absence using documents such as medical, employment or police records.
SB1 resident visa applicants must also evidence they have maintained an intent to return to the US. This can be done using by voting in US elections, maintaining a US residence, maintaining a US bank account, filing US tax returns or payment of US utility bills. If approved the applicant will have their US permanent residence reinstated.