MPF Announcement 2025-33

MPF Program – Updated Mandate for ULDD Phase 5 XML File Format 

Effective Date: July 16, 2025

We are providing an important update regarding the Uniform Loan Delivery Dataset (ULDD) Phase 5 XML file format to help our PFIs prepare for upcoming delivery requirements.

While Fannie Mae’s official mandate date for ULDD Phase 5 remains July 28, 2025, the MPF^® Program has established an earlier mandate date of July 16, 2025, to ensure sufficient time for document certification and avoid funding delays for MPF Xtra^® loans.

• PFIs must account for the time needed to obtain document certification and complete funding with Fannie Mae.
• Submitting ULDD Phase 5 files by July 16, 2025, aligns with our recommendation to allow seven (7) full business days for the document certification process after funding request submission.
• Loans not submitted in ULDD Phase 5 format that do not complete certification before Fannie Mae’s July 28 mandate date may need to be resubmitted in ULDD Phase 5 format, potentially delaying funding.

This updated MPF Program mandate date applies to all MPF loan deliveries via batch submission, including:

• MPF Traditional (Conventional/Conforming and Government loans)
• MPF Xtra
• MPF Government MBS

Action Required

• PFIs should work closely with their Loan Origination System (LOS) vendors to ensure all necessary updates are in place to capture and deliver the required ULDD Phase 5 data points by July 16, 2025.
• For more details on the ULDD Phase 5 update, please refer to Fannie Mae’s update.

Reminders

• The MPF Program is currently accepting files in the ULDD Phase 5 format. We encourage PFIs to make system updates now and begin submitting ULDD Phase 5 files in preparation for the upcoming mandate.
• Updates related to the Credit Score and Credit Reporting Initiative—including requirements for tri-merged vs. bi-merged credit reports, FICO® Score 10T, and VantageScore® 4.0—are forthcoming. We will provide additional guidance as it becomes available.

For questions or support, please contact the MPF Service Center at 877-345-2673 or mpf-help@fhlbc.com