Tier 3
Research by the agency. If the agency has been unable to verify citizenship and identity through the available automated and manual interfaces, staff shall review the case file and imaged documents to determine whether a hard copy verification has already been provided.
NOTE : For verification of citizenship and identity, it is acceptable to access the file in Tier 3 to determine if documentation has previously been provided before accessing the Tier 2 sources. Both Tier 2 and Tier 3 must be followed before proceeding to Tier 4.