FORM UC-36 (REV. 09-2026)UCDP MANDATE: 2026-11-02
UADCHECKPre-submission inspection of UAD 3.6 packages

UAD1010

FATAL

Official message text · Appendix H-1: UAD Compliance Rules — URAR, v1.5

Provide the total number of ADUs, even if the value is 0.

Fatal — a single unresolved Fatal makes the entire submission come back NOT SUCCESSFUL (UCDP Hard Stop 401).

What triggers UAD1010

The published rule logic, verbatim:

If AccessoryDwellingUnitTotalCount is not provided

  • Checked for the Subject property.
  • • Bound to MISMO data point AccessoryDwellingUnitTotalCount at ../VALUATION_ANALYSIS/PROPERTIES/PROPERTY/PROPERTY_DETAIL/

How to fix it

On the URAR, this lives at: Subject Property → Accessory Dwelling Units. Complete or correct that field in your form software, regenerate the package, and re-check before submission.

Because this is a Fatal edit, do not submit until it is resolved — one Fatal bounces the whole package.

The free UADCheck inspection evaluates UAD1010 automatically — attach your package and see in seconds whether it fires.

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Related messages

Source: Appendix H-1: UAD Compliance Rules — URAR, v1.5 (public GSE document). Verified against the published spreadsheet; not affiliated with Fannie Mae or Freddie Mac.