Home Learning Center Loan Delivery Test Environment Learning Center Loan Delivery Test Environment Learning Center Fannie Mae-delivering lenders can use the Loan Delivery Test Environment (LDTE) to test their production-ready Uniform Loan Delivery Dataset (ULDD) data. Job Aids Loan Delivery Test EnvironmentWire Instruction Reference IdentifierULDD Phase 5 Resources Online Learning Loan Delivery Quick Start for Whole Loans Other Resources Test Case Scenarios Fannie Mae Test Cases (Excel) Appendix B DU and Appraisal Doc File ID Test Case Scenarios DU Test Files