Emerging MethodsMEDIUM4.5% of exam

What must an appraiser establish before relying on data from a third-party aggregator?

Correct Answer

B) That the data is adequate for the intended use

Before relying on an aggregator’s information, assess whether its coverage, date, accuracy and detail are adequate for the property and intended use. Provider insurance, a credential or client approval alone does not establish that the data is reliable for this assignment. Investigate significant conflicts or gaps and retain support for the decision to rely on the data.

Answer Options

That the aggregator carries professional insurance

That the data is adequate for the intended use

That the aggregator is licensed in that state

That the client has approved that data source

Why This Is the Correct Answer

Option B is correct because the appraiser must determine that the data is adequate for the intended use. Professional standards require that data, assumptions and inputs be appropriate for the intended use as of the valuation date. That means assessing coverage, timeliness, accuracy and detail for the subject property.

Why the Other Options Are Wrong

Option A: That the aggregator carries professional insurance

Option A requires that the aggregator carries professional insurance. Insurance concerns the provider's liability coverage and says nothing about whether the data is accurate or suitable for this assignment.

Option C: That the aggregator is licensed in that state

Option C requires that the aggregator is licensed in that state. A provider credential does not establish that its data is reliable or adequate for the intended use.

Option D: That the client has approved that data source

Option D requires that the client has approved the data source. Client approval does not relieve the appraiser of judging whether the data supports credible results.

Fit for purpose

Data must be fit for this purpose, this property and this date. Who sells it matters less than whether it works.

How to use: Use this when choices offer provider credentials or approvals as proof of data quality.

Exam Tip

Look for the answer focused on the data's adequacy for the intended use, not on the provider's status or client sign-off.

Common Mistakes to Avoid

-Assuming a client-approved source needs no evaluation
-Treating provider insurance or licensing as data verification
-Ignoring time lags in aggregated data

Concept Deep Dive

Analysis

This question tests what must be confirmed before relying on third-party aggregated data. The key requirement is that the data be appropriate and adequate for the intended use. Provider insurance, licensing or client approval does not establish that the data is reliable for the assignment.

Background Knowledge

Data aggregators compile information from public records, MLS feeds and other sources, with varying accuracy and timeliness. Appraisers must evaluate whether data is adequate for the property and the intended use. Significant conflicts or gaps should be investigated and the reliance decision supported in the workfile.

Real-World Application

An appraiser uses an aggregator for rural land sales but finds the service lags several months behind recorded deeds. Because the effective date is current, the appraiser supplements the data with county records and local broker interviews. The workfile documents why the combined data is adequate.

data aggregatorintended usedata adequacyreliabilitythird-party data

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