Uniform Loan Delivery Dataset
The Uniform Loan Delivery Dataset (ULDD) supports the work to implement uniform data standards and defines the data that we require at loan delivery based on loan type, loan feature or other business requirements.
Business Resources
ULDD data is granular, standardized, and has clear definitions, providing sellers with a common understanding of the meaning of each data point. The result is greater transparency, which helps sellers gain a better understanding of our assessment of mortgage risk and purchase requirements on loans they sell to us.
ULDD Revisions
The ULDD Revisions webpage is designed to assist you with loan delivery requirement revisions to ULDD since the last publication. The revisions include ULDD specification updates and ULDD impacts that were previously communicated in Single-Family Seller/Servicer Guide (Guide) Bulletins. The webpage will be updated periodically.
ULDD Publications
ULDD Phase 4a Updates
Freddie Mac is providing updates to existing ULDD Phase 4a data points (i.e., enumerations, implementation notes, conditionality, and conditionality details).
ULDD Phase 5
The Phase 5 updates add new data points and updates to existing data points to support the Enterprise Credit Score and Credit Reports Initiative, alignment with the new redesigned UAD 3.6 and business critical requirements.
The following resources are available to help you with the implementation of ULDD:
- ULDD Announcement – May 20, 2025
- ULDD Announcement – September 12, 2023
- ULDD Supporting Documentation Updates
- Appendix D
- Summary of ULDD Phase 4a Updates and Phase 5 Specification
- ULDD Job Aid for the Alignment with UAD 3.6
- Freddie Mac ULDD Learning Help Page
Implementation Timeline
Additional Resources
Technical Resources
The following resources provide the technical documentation that Freddie Mac-approved Sellers and vendors need to implement Freddie Mac's loan delivery data requirements:
Announcements
2025
- May 20, 2025 – ULDD Phase 4a and Phase 5 Updates and Guidance
2023
- December 19, 2023 – ULDD Phase 5 Supporting Documentation Updates
- September 12, 2023 – ULDD Phase 4a Updates and Phase 5 Specification Release
2022
- April 26, 2022 – ULDD Phase 4a Supporting Documentation Updates
2021
- December 14, 2021 – ULDD Phase 4a Specification Release
- June 8, 2021 – ULDD Updates for CMT-indexed ARMs Retirement, Implementation Notes and Enumerations
2020
- December 1, 2020 – Updates to Support ULDD LIBOR to SOFR ARM Index Transition, Condo Delivery and Home Possible® Mortgage
- April 21, 2020 – ULDD Updates Supporting SOFR ARM Index Transition
2019
- May 30, 2019 – ULDD Update Further Aligns GSE Specifications
- May 14, 2019 – ULDD Phase 3 Announcement
- January 10, 2019 – ULDD Phase 3 Reminder
2018
- July 10, 2018 – ULDD Phase 3 Update
- February 26, 2018 – ULDD Phase 3 Loan Selling Advisor Updates Deferred Until March 5
- February 21, 2018 – ULDD Phase 3 Reminder & Updates
- January 30, 2018 – ULDD Phase 3 Mandate and Application Received Dates
2017
- November 7, 2017 – ULDD Phase 3 Updates and Guidance
- June 27, 2017 – ULDD Phase 3 Addendum Updates
- March 28, 2017 – ULDD Phase 3 Update Announced
2016
- December 13, 2016 – ULDD Phase 3 Announced
2013
- November 29, 2013 – GSE Publish ULDD Phase 3 Preview Specification
- August 22, 2013 – ULDD Phase 2 Preparation Tips, Specification Update, and More
- May 20, 2013 – Preparing for the Phase 2 ULDD
2012
- December 13, 2012 – GSEs Publish Phase II ULDD Specification
Uniform Loan Delivery Dataset (ULDD) - Revisions
Most Recent Updates as of May 20, 2025
The Uniform Loan Delivery Dataset (ULDD) revisions webpage is designed to assist you with loan delivery requirement revisions to ULDD since the publication of the last Appendices A and D on May 20, 2025. These revisions include ULDD specification updates and ULDD impacts that have been previously communicated in the Single-Family Seller/Servicer Guide (Guide) Bulletins.
The information on this webpage will be removed once the revisions have been incorporated into Appendices A and D.
The ULDD revisions are listed in the tables below. These tables identify the communication date and Guide Bulletin number if applicable, Sort ID, Data Point Name, Revision Effective Date, a description of the change, and the ULDD column(s) that have been revised (text being removed will be displayed in red strikethrough, text being added will be displayed in blue).
Revised ULDD Data Points
There are no ULDD revisions at this time.
This information is not a replacement or substitute for the requirements in the Freddie Mac Single-Family Seller/Servicer Guide or any other contractual agreements. This information does not constitute an agreement between Freddie Mac and any other party. © 2025 Freddie Mac.