When using additional information that was not available to the original appraiser, what is a review appraiser prohibited from doing?

In the context of appraisal practice, the review appraiser must adhere to the principles of maintaining the integrity and objectivity of their evaluation. When using additional information that was not available to the original appraiser, it is crucial that the review appraiser does not use this new information solely to discredit the original appraiser's opinion of value. This prohibition is in place to ensure that the review process is fair and focused on assessing the methodology and validity of the original appraisal rather than undermining the original appraiser's professional judgment.

Using additional information to discredit the original appraiser's value opinion could lead to potential biases and a lack of objectivity, which are counter to the ethical standards outlined in the Uniform Standards of Professional Appraisal Practice (USPAP). The aim of a review appraisal is not to diminish the credibility of the original analysis but rather to assess it while considering all relevant facts. Therefore, it is essential for the review appraiser to use new information judiciously, ensuring that it contributes to an accurate and fair evaluation rather than acting as grounds for discrediting another's professional work.