This policy memo governed adjudication of immigration relief benefits by USCIS and required the issuance of requests for further evidence and notices of intent to deny giving applicants an opportunity to supplement the record and address concerns prior to the denial of their immigration case. The policy was updated 7/13/18 https://www.uscis.gov/news/news-releases/uscis-updates-policy-guidance-for-certain-requests-for-evidence-and-notices-of-intent-to-deny and the notice of the updates contains a useful explanation of the practice that has been historically used by USCIS to adjudicate cases.