You will use the three step consular processing system. Here is a link to my article on that: http://www.troylaw.net/?p=5 If your husband lived in the US illegally then he may be subject to a 3/10 year bar so you want to have his case fully analyzed before you start the process. In that instance, you would need to file for an extreme hardship waiver in addition to the regular process. If he is legally residing in a third country, then he can have his application processed there. If not, you should contact that US consulate to see if they will except him regardless. Otherwise you would need to process through his own consulate or find another to accept his case. Meanwhile if he is scared and has fled his own country, he may be eligible for asylum in the US. Please schedule a consult with a competent immigration attorney who specializes in that type of case!
Answered on Feb 18th, 2011 at 10:28 AM