We have received a particularly remarkable green card approval a few weeks ago. USCIS alleged fraud and denied the green card where the spouse of a US citizen had entered the US on visa waiver and then applied for Adjustment of Status (AOS) within a few days after entry. We were retained once the green card had been denied. The allegations of fraud or misrepresentation are particularly troublesome because they operate as a PERMANENT bar against immigration. There is a narrowly tailored waiver available, but it can be difficult to obtain.
When an I-485 is accepted at the Service Center, requests for FD-258 FBI fingerprint checks, fingerprint fees, and G-325A consular background checks are made by USCIS. Responses to these requests come back to USCIS and must be matched up with the appropriate files held in staging. File Maintenance "file connects" these responses to the corresponding files.