Home Single-Family News Center ULDD Phase 5 (5.1.0) Specification Release May 20, 2025 ULDD Phase 5 (5.1.0) Specification Release We’re updating the ULDD to provide further guidance on Phase 5 data implementations based on feedback. Download announcement 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