No Title
Usually there are 5 main reasons -
1. Out of status for a period of time OR
2. Unauthorized receipt of money from an employer without INS approval OR
3. Abrogation of a supporting document, i.e., revoking of the i-140 on the basis which the i-485 application was filed OR
4. Criminal record (indicated by FBI) OR
5. Failure to respond to a request by INS within specified time, i.e., RFE response, FP completion, etc.