It is initiated by USCIS or other Govt agencies dealing with approval of an Immigration Petition or Visa stamping. When the original petition lacks enough documentation to make a favorable decision then more documents/evidence are requested. Request for evidence is also commonly called a “RFE”.
What you should know about RFEs:
International Evaluations provide specialized RFE Solutions in several areas.
Our expertise is in identifying what those evidences may be, alternate evidences and preparing the Response. With literally thousands of RFEs responded to by us – we know what we are doing.