The State Department sends back cases of suspected fraud or if a petition seems to have been approved in error.
A large percentage of such cases end up being REAFFIRMED by USCIS. Only a small percentage are REVOKED. USCIS may or may not contact you for further information, explanation, or an interview.
If you have strange or difficult circumstances or paperwork issues, you may have a problem or merely a delay. You have not provided any specific details to address it further.
