Administrative Appeals Office

[Depika]

When somebody appeal his I-485 denial to administrative appeals office, does the USCIS send the applicant a receipt for the appeal? Does the USCIS try to take a second look Into the case to find out if they can adjudicated his/her application before they forward his case to the Administrative Appeals Office in Washington D.C. and how long it take the USCIS to forward the appeals case to AAO in Washington