Home Single-Family News Center Open Production Period has begun January 4, 2021 Open Production Period has begun Effective Jan. 1, 2021, all lenders may begin using the redesigned Form 1003 and updated DU Spec to submit loans to production using the new DU user interface. Launch DU Recent News July 2, 2025 Announcement SEL-2025-05: Selling Guide Updates June 30, 2025 Testing Available for UCD v2.0 Specification and UCD Critical Edits June 18, 2025 Lender Letter LL-2025-02 Advance Notice of Changes to Servicing Processes and Systems