source:
  type: guide
  id: fnma-svc-f-3-21
  authority: 'Fannie Mae Servicing Guide F-3-21 — Acronyms and Glossary of Defined
    Terms: U'
  description: 'Fannie Mae Servicing Guide F-3-21 — Acronyms and Glossary of Defined
    Terms: U.'
  coverage_tier: operative
obligations:
- id: fnma-svc-f-3-21-full
  canonical_id: fnma-svc-f-3-21-full
  section: 'Fannie Mae Servicing Guide F-3-21 — Acronyms and Glossary of Defined Terms:
    U'
  type: do
  tags:
  - regulator-direct
  - fnma
  - servicing-guide
  - corpus-expansion
  - tier-operative
  primary_source:
    tier: 1
    authority: 'Fannie Mae Servicing Guide F-3-21 — Acronyms and Glossary of Defined
      Terms: U'
    source_class: fnma-guide
    source_url: https://singlefamily.fanniemae.com/media/document/pdf/servicing-guide
    snapshot_id: cf63a82bbb4adfba
    fetched_at: '2026-05-22T23:53:19Z'
    content_hash: sha256:89df66c43baad07f8a8dd9d224492fff7d15e8839edba02ad0e74c7e50fe5da3
    paragraph_quote: 'F-3-21, Acronyms and Glossary of Deﬁned Terms: U (05/15/2019)
      UETA Uniform Electronic Transactions Act underwriting documents All of the documentation
      used to support the lending decision for a mortgage—such as the loan application
      and other documents used to verify a borrower’s employment, income, deposits,
      and credit history. underwriting performance review An after-the-fact review
      and risk assessment for a sampling of the mortgage loans Fannie Mae purchases
      or securitizes to ensure that they satisfy Fannie Mae’s mortgage loan eligibility
      criteria and underwriting guidelines. Uniform Mortgage-Backed Security (UMBS)
      A common security issued by the GSEs that is eligible for trading in the To-be-Announced
      market. The securities are backed by ﬁxed-rate mortgage loans secured by single-family,
      one-to-four unit properties and are identiﬁed Published May 13, 2026 752 by
      certain pool preﬁxes. unit mortgage A mortgage (or share loan) on an individual
      residential unit in a PUD, condo, or co-op project. UPB unpaid principal balance
      USPAP Uniform Standards of Professional Appraisal Practice'
  judgment: false
