My parents are here in the USA on tourists visa. We filed for AOS in August 2018 and completed biometrics within 30 days. Our case processed at NBC. We received RFIE requesting a translated birth certificate as a proof showing that I?m their daughter. Case status online was updated to something like ? We received your RFIE and now working on your case? . Does anyone know if I should expect to receive some sort of notification that our RFIE was excepted? Thanks in advance!