A request for evidence or RFE is a formal request from USCIS to provide further (additional) documentation for a pending application for an immigration benefit. Failure to file a timely and complete response can result in a denial of the application.
Absolutely not. A well prepared response that addresses each specific point made by the USCIS will result in the application being approved.
Prior to June 16, 2007, the USCIS gave applicants 87 days to file a response. Since then, however, the USCIS has adopted a “flexible response time” policy which empowers the adjudicating officer to give as little as 30 days to provide a response.
Typically the decision will come quickly after the response is filed but it will depend on the complexity of the RFE and the normal processing time line for the type of filing. It can be as little as one week but is normally concluded in less than three months.