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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:

 

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

2022

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

2018

2017

2016

2013

2012

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

Important Notice

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.