QC FUNDAMENTALS
Post-closing mortgage quality control: a practical guide
Post-close QC is not one checklist. It is a controlled cycle: define the population, select loans without bias, review complete evidence, perform required reverifications, classify and remediate defects, report trends, and retain proof.
Population and selection
The population must be complete enough to support the method described in the lender's QC plan. A random sample must be reproducible; discretionary selections should be tracked separately so they do not contaminate the random result.
Loan-level review
A useful review joins eligibility, underwriting, collateral, disclosures, closing documents, delivery data, and reverification evidence. Every exception needs a source, rule or policy reference, severity, and disposition.
Management reporting
Loan reports are evidence snapshots. Cycle reporting should add defect rates, categories, root causes, corrective actions, and responsible owners. Metrics must not hide unresolved material findings behind an average.
Automation boundary
Parsing standardized XML and recomputing dates are strong automation candidates. Third-party reverification and discretionary judgment are workflows, not facts a model should invent.
Primary references
Last methodology review: July 14, 2026. Source requirements and vendor capabilities change; verify current text before relying on it.