Is there any way to find out online, when N-400 file has been sent to the local/district office from the Service Center, for interview? I read in a previous post that if somebody does not see the case status information of N-400 online, that means that the file has been sent to the local office for scheduling interview. Is it correct? If it is correct, does that mean that we cannot see the movement (status) of N-400 online after it has been sent to local office?? In that case what is the message that shows up online, if we check the status online after the file has moved to local office??
Before sending the file to local office for interview, does the Service Center finish ALL the necessary works, such as fingerprint, background check, name check, any other checking, etc.?? What does the local/district office do regarding N-400, other than conducting interviews and oath ceremonies?? Does the interview notice come from the local office or the Service Center? Thanks to anybody who can share their experience on these questions.

Before sending the file to local office for interview, does the Service Center finish ALL the necessary works, such as fingerprint, background check, name check, any other checking, etc.?? What does the local/district office do regarding N-400, other than conducting interviews and oath ceremonies?? Does the interview notice come from the local office or the Service Center? Thanks to anybody who can share their experience on these questions.