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 November 25, 2025 Lender Letter LL-2025-04 Confirmation of Conforming Loan Limit Values 2026 November 25, 2025 In Case You Missed It: Policy Updates November 17, 2025 Enhancing Efficiency: Undisclosed Liabilities in Desktop Underwriter