Keep a Source and Version Log for Loan Research

A loan research note is easier to trust when it records where each fact came from and which version you used. A source log does not need to be complicated. It should let you distinguish a saved snapshot, a live query, a lender’s quote and your own calculation later.

Record evidence type as well as the URL

A link alone may point to content that changes. Keep the publisher, title, retrieval date, source period or version and the filters used. Mark a statement as a source value, a verified current quote, a calculation or an assumption. That distinction prevents an illustrative model from being remembered as a lender promise.

Worked example

Imagine a borrower records a historical mortgage count on Monday, a live FEMA query on Tuesday and a lender quote on Friday. A single ‘checked this week’ label hides three different evidence types. A small log with separate dates and scope notes makes the difference clear. If the quote later changes, retain the old version and add the new one rather than rewriting the entire history as though the new terms were always available.

This example is illustrative, not a finding about a named borrower, company or property.

A practical research workflow

Use one row per source observation. Include a private reference label where sensitive documents are involved, and store those documents separately. Save exact filter choices for public searches. For a calculation, record the input values and formula or tool used. Review the log before comparing figures so differences in date, scope or units are visible.

Checks before you use the result

• Record publisher, retrieval date and source version.
• Label source values, quotes, calculations and assumptions differently.
• Keep changed document versions instead of silently overwriting them.
• Use private labels rather than exposing sensitive files in a public log.

What this evidence cannot establish

A well-organized log does not verify a source’s accuracy or establish that a quote remains available. It improves traceability and makes uncertainty easier to see, but important decisions still require current, appropriate evidence.

Questions readers ask

Do I need to save every page as a file?

Not necessarily. Match the recordkeeping to the importance of the question, the likelihood of change and any privacy concerns. At minimum, keep enough details to identify the observation.

Should a calculator output get its own log entry?

Yes, when you rely on it. Record the assumptions and inputs so another result can be compared on the same basis.

Continue your research

• Browse the free loan resource library
• Find more loan research guides
• Official Guide, Worksheet or Calculator: Choose the Right Resource

Sources and scope

• CFPB public complaint field reference
• FinToku sources and corrections policy

Prepared November 7, 2026 using the linked public source context and directory methodology. Historical source periods are identified in each directory. Current offers, individual account facts and program availability require separate verification.

Explore this topic further

Check your assumptions with these tools and related guides.

Read related guides

• Corrected Mortgage Disclosure: Keep Both Document Versions
• Business Collateral Valuation: Record the Date and Report Version
• Debt Collector vs Original Lender in Complaint Research

Further reading

CFPB consumer financial guides