Applications & Technology

Uniform Collateral Data Portal

A single portal for the electronic submission of appraisal data files

To facilitate electronic delivery of appraisal report data to the government-sponsored enterprises (GSEs), Fannie Mae and Freddie Mac developed the Uniform Collateral Data Portal® (UCDP®) as part of the Uniform Mortgage Data Program® (UMDP®).

If an appraisal report is required, lenders must use UCDP to submit electronic appraisal data files that conform to all GSE requirements – and when applicable, the Uniform Appraisal Dataset (UAD) – before the mortgage is delivered to Fannie Mae or Freddie Mac.

Uniform Collateral Data Portal Availability

Every day, 24 hours a day, except from 11 p.m. ET on Saturdays until 5 a.m. ET on Sundays.

UCDP Integration Environment Availability

Every day, 24 hours a day, except from 7 p.m. ET on Fridays until 7 a.m. ET on Mondays.

UCDP Production Environment

Every day, 24 hours a day, except from 11 p.m. ET on Saturdays until 5 a.m. ET on Sundays.

UCDP Maintenance Calendar

All Technology Application Availability


UCDP is a single portal for lenders to submit appraisal reports for conventional mortgages to Fannie Mae or Freddie Mac. Through UCDP, lenders can upload appraisal data and view edits and submission details.


Get real-time feedback on UCDP submissions to Fannie Mae with risk score, risk flags, and messages powered by Collateral Underwriter® (CU®).

Lenders have a GSE-consistent approach and understanding of appraisal definitions and requirements and use a common portal to submit appraisal data files.


New UCDP Accounts: To use UCDP, your company must first be set up directly with Fannie Mae for this application. See How to Register for UCDP for more information. Your UCDP Lender Administrator (Admin) can invite additional administrators and users to register for the portal. If you need assistance identifying the UCDP Lender Admins for your organization, contact the UCDP Support Center at 1-800-917-9291 for assistance.

Existing UCDP Accounts: A current UCDP Lender Admin can manage their users and accounts in Technology Manager: view the job aid to learn more. If you don’t have an active UCDP Lender Admin for your organization, click register a UCDP Lender Admin. For additional guidance on managing accounts and users in UCDP, refer to the Lender Admin Reference Series.

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