A Request for Evidence (RFE) is a formal notice from U.S. Citizenship and Immigration Services (USCIS) indicating that your application or petition is missing required documentation or needs additional information before a decision can be made. To respond, review the RFE carefully, gather the exact documents or explanations requested, and submit them before the stated deadline. Ensure your response is complete, well-organized, and includes a copy of the RFE notice as a cover page.