As a reminder HUD issued Notice H 2012-06 Unique Entity Identifier Replaces Dun & Bradstreet Data Universal Numbering System for Identification of Federal Awards.

This Notice provides background on the federal government’s transition from using the Dun & Bradstreet Data Universal Number System (DUNS Number) to the Unique Entity Identifier (UEI). It also provides resources associated with the transition and describes related requirements.

You can read the full notice here.