RAJ5
This is what I heard, so do not quote me on this later. If someone is married less than 2 yrs. before filing I-485, if something is not clear about the birth certificate or if the employement status is not clear or needs clarification, INS issues RFE. If our response to RFE doesn't clarify their concerns, the case gets transferred to local INS office. If the RFE is about employement verification, it is wise to submit to as many paystubs as possible (if sticking with the sponsoring employer even after 180 days) or submit new employer's letter with new employer's paystubs. That could avoid local transfer. Also, if the case is sponsored by a "prospective " employer whom you will be working after getting GC, the case will most likely get trasnferred to local office unless the beneficiary joins the company as soon as he gets EAD and notify the INS that he joined the prospective employer by showing employer letter and pay stubs. This show good intent and that would avoid case transfer to local office.