There's a MAVNI Facebook page, mostly populated by legal immigrants trying to enlist under MAVNI. The people there report that piles of MAVNI enlistment contracts have been cancelled because people who enlisted subsequently failed the SSBI for such things as a bad credit report, relatives who are unauthorized immigrants, working unlawfully, or using a bad Social Security number. One person had her enlistment contract cancelled because she used her own SSN to make a banking transaction for someone else who didn't have one. She wasn't charged with any crime but the Army cancelled her enlistment contract a few weeks before she shipped out to basic training.