Technology Integration Archive

Files

Title Description

DU Specification MISMO V. 3.4 updated

Data specification containing the Uniform Loan Application Dataset (ULAD) and additional data for conventional and government loans.

Residential Loan Data Format 1003, V. 3.2

 

Specifies the data formats and codes for creating the Fannie Mae loan data file (Form 1003) including the data documentation for Community Lending and government loans. This includes the lengths and types of field data, field data dictionaries, applicable code conversions, and the identification of required fields for underwriting.

MISMO AUS V. 2.3.1 Underwriting Requirements Specification

 

Identifies the Fannie Mae data specifications for the MISMO Automated Underwriting Specification (AUS) version 2.3.1 Document Type Definition (DTD). The AUS 2.3.1 contains data specifications for conforming loans, government loans, and loans eligible for Fannie Mae Community Lending.

MISMO AUS V. 2.3.1 DTD with Fannie Mae Extensions

The Document Type Definition (DTD) corresponds to the 1003, v. 3.2 and includes Fannie Mae extended data.

Credit Report Data Format Specification (CRD)

Details the data formatting and reference codes needed to decipher the credit report returned by Fannie Mae's Credit Service.

DO/DU ARM Plan Numbers

 

The Fannie Mae ARM Plan spreadsheet provides a list of ARM Plan numbers and corresponding ARM product descriptions available in Desktop Originator (DO) and Desktop Underwriter (DU). Updated Sept. 30, 2019.

Fannie Mae DU Wrapper

The Desktop Underwriter (DU) schema corresponds to the 1003 and includes Fannie Mae extended data.

Title Description

Credit Provider Name and Code Update Information

This spreadsheet summarizes the updates that have been made to the list of credit providers and those which took effect on November 16, 2019.

FHA County Names (.txt)

This fixed data file includes a comprehensive list of 2011 FHA County Names and associated states. These names are derived from the FHA website and correspond to the values Fannie Mae uses in DO/DU. Updated December 17, 2010.

FHA County Names (.xls)

This spreadsheet includes a comprehensive list of 2011 FHA County Names and associated states. These names are derived from the FHA website and correspond to the values Fannie Mae uses in DO/DU. Updated December 17, 2010.
Title Description

Uniform Closing Dataset (UCD) Critical Edits | Oct. 26, 2020

As announced on August 11, 2020, Fannie Mae will be transitioning UCD edits from Warning to a Fatal severity over the next two years. In preparation for the transition to Fatal edits, lenders should review all feedback messages returned by the UCD Collection Solution and B2B Gateway to resolve any issues, particularly those relating to future Fatal edits. This guide provides this year’s previous, current, and upcoming UCD updates in an easy-to-read format all in one document. See the 2019 Release Notes Summary to review an archive of the enhancements to UCD in 2019.

PE - Whole Loan Integration Impact Memo | Dec. 31, 2020

Effective December 31, 2020, Fannie Mae will cease purchase of LIBOR-Based ARMS. Leading up to this date, commitment lengths provided for LIBOR-Based ARMS will be shortened so as not to have any delivery dates extend past the end of the year. Visit Fannie Mae’s LIBOR Transition page for more information on how we are preparing.

DU Validation Service Integration Impact Memo | November 2020

Beginning in November 2020 and continuing through the remainder of the year, Fannie Mae will implement changes to modernize the technology supporting the Desktop Underwriter® (DU®) validation service. As part of the modernization effort, the manner in which the parameter data is populated for some DU “list” messages will change.

DU Messages API V2.0 August Update Integration Impact Memo | August 1, 2020

During the weekend of August 01, 2020, Fannie Mae will update Desktop Underwriter® (DU®) Messages API Version 2.0 to remove data fields in the API response that are consistently returning NULL values.

DU MISMO V3.4 Limited Production Period Update | August 1, 2020

During the weekend of August 1, 2020, Desktop Underwriter® (DU®) will begin accepting the new loan application submission file based on the DU Specification MISMO v3.4 (DU Spec) as part of the Uniform Residential Loan Application (URLA) Limited Production Period (LPP).

EarlyCheck Enhancements Overview | July 30, 2020

In Q3 2020, Fannie Mae will implement EarlyCheck™ Versions 6.3.3 and 6.3.4 into its production environment with the following edit changes noted below. These updates will apply to loans submitted to the production environment of EarlyCheck on or after the ‘Effective Date’ via the User Interface and Direct Integration. These updates may require changes to users’ systems or processes. This EarlyCheck Enhancements overview provides access to this year’s previous, current, and upcoming EarlyCheck updates in an easy-to-read format all in one document.

DU Validation Service Employment Validation Suspension Integration Impact Memo | May 4, 2020

To support sustainable homeownership while ensuring prudent risk management, we are temporarily suspending employment validation within the Desktop Underwriter® (DU®) validation service, in response to COVID-19’s unprecedented impact on employment. This update will apply to all new casefiles created in DU on or after May 4, 2020.

DU V. 10.3 May Update Integration Impact Memo | May 16, 2020

During the weekend of May 16, 2020, Fannie Mae will update Desktop Underwriter® (DU®) Version 10.3, as described in the Desktop Originator® (DO®)/DU Version 10.3 May Update release notes.

DU V 10.3 April Update Integration Impact Memo | April 11, 2020

During the weekend of April 11, 2020, Fannie Mae will implement updates to Desktop Underwriter® (DU®) Version 10.3, as described in the Desktop Originator® (DO®)/DU Version 10.3 April update.

UCD Collection Solution User Interface Enhancement | Jan. 28, 2020

On March 2, 2020, the UCD Collection Solution user interface design will be updated to reflect a more dynamic look-and-feel to improve user experience.

DU for Government Loans Integration Impact Memo | Jan. 25, 2020

During the weekend of Jan. 25, 2020, Desktop Underwriter (DU) for government loans will be updated to support FHA changes, as described in the DU for government loans January Release Notes.

DU MISMO V3.4 Early Readiness Release Update | January 2020

On Nov. 18, Fannie Mae published the updated Version 1.8 of the Desktop Underwriter (DU) Specification MISMO Version 3.4 (DU Spec) in support of the redesigned Uniform Residential Loan Application (URLA). The DU integration test environment will be updated in January 2020 to accept the DU loan application submission file based on the updated DU Specification Version 1.8.

DU Validation Service January Update Integration Impact Memo | Jan. 1, 2020

The logic used by the DU validation service to validate bonus, overtime and commission income using a Verification of Employment and Income report will be updated over the weekend of Dec. 14, 2019. This revised logic will apply to all new casefiles submitted to DU on or after Jan. 1, 2020.

DU V. 10.3 December Update Integration Impact Memo | Dec. 7, 2019

During the weekend of Dec. 7, 2019, Fannie Mae will implement an update to Desktop Underwriter® (DU®) Version 10.3, as described in the Desktop Originator® (DO®)/DU Version 10.3 December Update release notes.

Developer Portal Integration Impact Memo | September 26, 2019

On September 26, 2019, Fannie Mae will implement a new version of the Developer Portal 2.0. The changes in this release will not affect how integrated partners generate Client IDs, Client Secrets, Authorization Codes, Access Tokens or API Keys. This release will have no impact on integrated partners who have already successfully implemented a call to one of our APIs.

DU for Government Loans Integration Impact Memo | Oct. 19, 2019

During the weekend of Oct. 19, 2019, Desktop Underwriter® (DU®) for government loans will be updated to support the Maximum Loan-To-Value (LTV) and Combined Loan-To-Value (CLTV) Percentages for Cash-out Refinance Mortgages announced by FHA in Mortgagee Letter 2019-11.

Security Updates to DU Related Applications | Sept. 14, 2019

To ensure the integrity of your encrypted connection, we are removing support for TLS 1.0 and 1.1 protocol from Desktop Originator (DO), Desktop Underwriter (DU) and EarlyCheck™ to align with industry standards. We are replacing these older protocols with TLS 1.2 in production on Sept. 14, 2019.

UCD Collection Solution User Interface Enhancement | Nov. 15, 2019

On November 15, 2019, the UCD Collection Solution user interface design will be updated for a user-friendly look and feel for an enhanced performance.

EarlyCheck V. 6.0 Integration Impact Memo | June 22, 2019

During the weekend of June 22, 2019, Fannie Mae will implement EarlyCheck Version 6.0. These updates will apply to loans submitted to both the EarlyCheck production and integration environments via the User Interface and Direct Integration and may require changes to users’ systems or processes.

PE - Whole Loan User Interface Integration Impact Memo | Aug. 10, 2019

To ensure Fannie Mae applications and websites are secure, meet industry standards and client expectations, Transport Layer Security (TLS) Version 1.0 and 1.1 protocols will be retired from all Fannie Mae applications on August 10. Going forward, TLS 1.2 will be the only supported protocol.

DU Version 10.3 July Update Integration Impact Memo | July 20, 2019

During the weekend of July 20, 2019, Fannie Mae will implement an update to Desktop Underwriter (DU) Version 10.3, as described in the Desktop Originator (DO)/DU Version 10.3 July Update release notes.

Developer Portal Integration Impact Memo | June 14, 2019

On June 14, 2019, Fannie Mae will implement a new version of the Developer Portal 2.0. The changes in this release will not affect how integrated partners generate Client IDs, Client Secrets, Authorization Codes, Access Tokens or API Keys. This release will have no impact on integrated partners who have already successfully implemented a call to one of our APIs.

DU V. 10.3 MISMO V. 3.4 Early Readiness Release Update | July 1, 2019

On July 1, 2019, Desktop Underwriter® (DU®) will be updated to support the changes announced in the DU v10.3 MISMO® v3.4 Early Readiness Release - December 2018,

PE - Whole Loan User Interface Integration Impact Memo | Apr. 15, 2019

Effective April 20, the Pricing & Execution - Whole Loan user interface (UI) will only support TLS 1.2 in the test environment.

Property Data Requirements Integration Impact Memo | Apr. 12, 2019

Fannie Mae introduced the Property Data ID field and requirements to support this new field within DO/DU loan application submissions.

B2B Gateway Integration Impact Memo | Mar. 28, 2019

Fannie Mae is updating the internal authentication mechanism for integration requests coming into the B2B Gateway for the Uniform Closing Dataset (UCD) Collection Solution and Collateral Data Delivery Service (CDDS) applications. All UCD/CDDS direct B2BG integration traffic will be routed through the new authentication mechanism.

DU for Government Loans April 2019 Release Integration Impact Memo | April 20, 2019

During the weekend of April 20, 2019, Desktop Underwriter (DU) for government loans will be updated to support the announced FHA Third Party Verification changes announced by FHA in Mortgagee Letter 2019-01, as well as other message related updates.

EarlyCheck V. 5.8.1 and 5.8.2 Integration Impact Memo | Apr. 20, 2019 and May. 20, 2019

During the weekend of April 20, 2019, Fannie Mae will implement EarlyCheck Version 5.8.1, introducing new and modified edits to align with existing Loan Delivery edits and upcoming Loan Delivery edit changes; and new reporting categories for File Types 128 and 132. On May 20, 2019, Fannie Mae will implement EarlyCheck Version 5.8.2 to change the severity of ULDD Phase 3 edits from Warning-to-Fatal to Fatal, to align with the planned ULDD Phase 3 edit severity changes in Loan Delivery.

ULDD Integration Impact Memo | Mar. 4, 2019

Describes tips when you encounter the InvestorLoanIndentifier data point.

B2B Gateway Integration Impact Memo | Mar. 1, 2019 through Mar. 30, 2019

We are updating the internal authentication mechanism for integration requests coming into the B2B Gateway (B2BG) for the Uniform Closing Dataset (UCD) Collection Solution and Collateral Data Delivery Service (CDDS) applications.

EarlyCheck ULAD MISMO 3.4 Impact Memo | Feb. 23, 2019

Describes updates for EarlyCheck in support of EarlyCheck ULAD MISMO 3.4 through XIS.

DU for Government Loans February 2019 Release Integration Impact Memo | Feb. 16, 2019

During the weekend of Feb. 16, 2019, as described in the Release Notes, Desktop Underwriter (DU) for government loans will be updated in our production environment. Changes included in this release will apply to all loan casefiles submitted or resubmitted to DU for government loans on or after the weekend of Feb. 16, 2019. This release will be made available in the integration environment on or around Jan. 30, 2019.

DU Version 10.3 March Update Integration Impact Memo | March 23, 2019

During the weekend of March 23, 2019, Fannie Mae will implement an update to Desktop Underwriter (DU) Version 10.3, as described in the Desktop Originator (DO)/DU Version 10.3 March Update Release Notes. Except for the DU validation service enhancements described in the Release Notes, the changes in this release will apply to DU Version 10.3 loan casefiles submitted or resubmitted on or after the weekend of March 23, 2019.

EarlyCheck V. 5.8 Integration Impact Memo | Feb. 23, 2019

During the weekend of February 23, 2019, Fannie Mae will implement EarlyCheck Version 5.8 as described in the EarlyCheck Version 5.8 Release Notes. The changes in EarlyCheck Version 5.8 will apply to submissions to EarlyCheck via the User Interface and Direct Integration. Review this memo in addition to the Release Notes to ensure that your integrated system(s) will be prepared.

UCD Disabling TLS 1.2 Integration Impact Memo | Jan. 26, 2019

Fannie Mae will implement changes to only allow TLS 1.2 (and strong cipher suites) in the UCD Production Environment on January 26th, 2019.

DU V. 10.3 Update MISMO V 3.4 Early Readiness Release Integration Impact Memo | Jan. 1, 2019

Effective Jan. 1, 2019, DO/DU Version 10.3 will be updated in the Fannie Mae Integration Test Environment to accept the new DU loan application submission file via XIS Direct Integration, allowing lenders and technology solution providers time to complete development and testing prior to the DU production release in July 2019.

DU for Government Loans January 2019 Release Integration Impact Memo | Jan. 19, 2019

During the weekend of Jan. 19, 2019, Desktop Underwriter (DU) for government loans will be updated to support the 2019 VA county loan limits and 2019 FHA mortgage limits.

DU Validation Service Message Changes Integration Impact Memo | Jan. 16, 2019

The new messages will be deployed to the integration environment on Jan. 16, 2019 and will be included in an upcoming DU release scheduled for March 2019.

Developer Portal Integration Impact Memo | October 26, 2018

In October 2018, Fannie Mae implemented a new version of the Developer Portal 2.0. The changes in this release affect how lenders and digital alliances (technology solution providers) generate Client ID, Client Secret, Authorization Code, Access Token, and API Keys.

EarlyCheck V. 5.7.1 Integration Impact Memo | Jan. 1, 2019

On January 1, 2019, Fannie Mae will implement EarlyCheck Version 5.7.1 as described in the EarlyCheck Version 5.7.1 Release Notes.

UCD Delay Install of SSL Certificates | November 2018

Fannie Mae will delay the Certificates production release in the UCD Production environment to ensure customers have sufficient time to implement the production release.

DU V. 10.3 Integration Impact Memo | Dec. 8, 2018

During the weekend of Dec. 8, 2018, Fannie Mae will implement Desktop Underwriter (DU) Version 10.3 as described in the Desktop Originator/DU Version 10.3 Release Notes. The changes in this release will apply to new loan casefiles submitted to DU on or after the weekend of Dec. 8, 2018. Loan casefiles created in DU Version 10.2 and resubmitted after the weekend of Dec. 8, 2018 will continue to be underwritten through DU Version 10.2.

UCD V. 2.0 Integration Impact Memo | Oct. 19, 2018 through Jan. 26, 2019

Describes changes to only allow TLS 1.2 (and string cipher suites) in the UCD Test and UCD Production Environments. As a result, TLS 1.0 and 1.1 will be disabled for both environments. These changes will take place from Oct. 19, 2018 through Jan. 26, 2019. The schedule below details the UCD Environment implementation changes.

EarlyCheck V. 5.7 Integration Impact Memo | Nov. 17, 2018

During the weekend of November 17, 2018, Fannie Mae will implement EarlyCheck Version 5.7 as described in the EarlyCheck Version 5.7 Release Notes.

DU Findings Integration Impact Memo | Sept. 22, 2018

Describes updates specific to the Desktop Underwriter (DU) Underwriting Findings redesign scheduled for Sept. 22, including new navigation, filtering options and the ability to track changes between DU submissions.

DU V. 10.2 Integration Impact Memo September Update | Sept. 22, 2018

Describes updates to Desktop Underwriter (DU) version 10.2 scheduled for Sept. 22, including new messages, modify existing messages, and retire certain messages that are displayed in the DU Underwriting Findings report, and more.

EarlyCheck V. 5.6.1 Integration Impact Memo | Aug. 25, 2018

During the weekend of August 25, 2018, Fannie Mae will implement EarlyCheck Version 5.6.1 as described in the EarlyCheck Version 5.6.1 Release Notes.
Title Description

DU V. 10.1 1003 and MISMO 2.3.1 Test Case Suite

Our suite of test cases is designed to help verify your software application's ability to create and process loan information using our supported data formats and interfaces. These test cases contain fictional borrowers and sample data that can be submitted to Fannie Mae's services without incurring normally associated fees.

1003 3.2 and MISMO 2.3.1 Test Case Matrix

Our suite of test cases is designed to help verify your software application's ability to create and process loan information using our supported data formats and interfaces. These test cases contain fictional borrowers and sample data that can be submitted to Fannie Mae's services without incurring normally associated fees.

Title Description

Data Integrity Test Case Suite

Our suite of test cases is designed to help verify your software application's ability to create and process loan information using our supported data formats and interfaces. These test cases contain fictional borrowers and sample data that can be submitted to Fannie Mae's services without incurring normally associated fees.

Basic Test Case Suite

Our suite of test cases is designed to help verify your software application's ability to create and process loan information using our supported data formats and interfaces. These test cases contain fictional borrowers and sample data that can be submitted to Fannie Mae's services without incurring normally associated fees.

Test Credit Report Procedures

Instructions on how to use the Test Credit Agency in Desktop Underwriter and Desktop Originator.

Test Credit Report Characteristics

List of borrowers and characteristics in the Test Credit Agency, which can be used in Desktop Underwriter and Desktop Originator.