Yes. Appraisers must maintain a third-party position to your transaction. No appraiser can accept an assignment where bias could be interpreted. USPAP has a phrase used verbatim by many appraisal firms on their letters of transmittals: "Our assignment was not based on the reporting of a predetermined value, a direction in value that favors the cause of the client, the amount of the value opinion, the attainment of a stipulated result or the occurrence of a subsequent event directly related to the value opinion." USPAP is very clear on this issue. Appraisers cannot be advocates for any client. Although it may seem unusual to some users to have to pay for a report that did not provide them a favorable outcome, appraisers governed by appraisal licensing laws must remain objective. However, if you feel that the appraiser did not consider all data that they should have, discuss this with the appraiser. And this may affect the appraisal assignment results, if it is deemed relevant and should have been included in the analysis.