How it works
Day 1 Certainty eligibility
Official Fannie Mae resource: Desktop Underwriter D1C provides:- Rep and warranty relief on income, employment, and assets
- Reduced documentation requirements
- Free re-verifications for up to 90 days after the initial report
“Current as of” date: For DU, this reflects the end of period from the borrower’s last pay statement.
Implementation checklist
Use this sequence for a production-ready Fannie Mae flow:- Complete your Truv integration using LOS integrations or Custom Integration
- Collect borrower income and, when needed, asset verification through Truv
- Retrieve the latest
voie_report_idandvoa_report_id - Submit the Report ID into Desktop Underwriter
- Validate DU findings and confirm Day 1 Certainty eligibility
- If data is refreshed, use the newest Report ID for resubmission
Integrate with Encompass
For ICE Encompass clients, Truv’s Report ID appears in the Loan: GSE Additional Provider Data screen as Truv (Bor, CoBorr).VOIE field mapping
Write the Report ID to Encompass FieldIDGSEVENDOR.X50. For borrower and coborrower, comma-separate the Report IDs:
VOA field mapping
| Borrower | Coborrower |
|---|---|
GSEVENDOR.X37 | GSEVENDOR.X38 |
Validation checklist
Verify report generation
Confirm Truv generated the latest VOIE and VOA reports and that the borrower completed all required verifications before you submit to DU.
Confirm field mapping
If you use Encompass, verify
GSEVENDOR.X50, GSEVENDOR.X37, and GSEVENDOR.X38 are populated correctly before DU submission.Submit to DU
Submit the current Report ID in Desktop Underwriter and confirm DU can retrieve the report successfully.
Reference test data
Use shared sandbox credentials from Test Credentials and Test Credentials for end-to-end borrower login testing. Use the Fannie Mae-specific accounts and report IDs below when you need DU-oriented reference data and sample PDFs.Borrower test accounts
| Username | Password | SSN | Borrower Name | Sample Report |
|---|---|---|---|---|
firsttimeborrower | goodpassword | 991-91-9991 | Alice Firstimer | |
fannie-test.case4 | goodpassword | 666-00-6666 | Pitt Rock | |
fannie-test.case5 | goodpassword | 999-60-6666 | Suzi Builder | |
fannie-test.case6 | goodpassword | 999-40-5000 | John Homeowner | |
fannie-test.case7 | goodpassword | 999-42-2345 | Lucky Knowscore |
Income & employment report IDs
Assets report IDs
Test in sandbox
For shared sandbox setup and reusable credentials, see Test Credentials and Test Credentials. For the mortgage-specific validation flow, see GSE testing.Next steps
Asset and Income Modeler (AIM)
Freddie Mac Loan Product Advisor integration
Sample Reports
Shared report retrieval patterns and Encompass mappings
Sandbox
Sandbox credentials and test scenarios
Launch Checklist
Pre-production validation