An appraiser is asked to show an opinion of Fair Market Value of the subject property on a specific date (generally date of inspection) based upon Sales Comparison Approach, Cost Approach, and Income Approach. With the Sales Comparison Approach being the most reliable for transactions that have many similar closed comparable sales available.
If the comparable sales have personal property, sale concessions, or special creative financing terms, the appraiser must analyze those contributions to the value of these comparable sales. Be very diligent in obtaining these contributions, then adjust accordingly in the grid based upon paired sale analysis done by the appraiser. That is what should determine the Fair Market Value of the subject property.
The price of the subject property may be different than its Fair Market Value. So what? We as appraisers are not asked to establish the value of the transaction, but the Fair Market Value of the subject property which serves as the vehicle used as collateral for financing, taxation, etc.
I personally abhore the fact that appraisers must analyze a subject property's sale contract as routine appraisal protocol. That contract usually exibits someone's hope of value for the final sale price and is generally loosely founded upon irrelevant characteristics that have little or no market impact (paired sales analysis). When, in fact, most sale contracts are sent to the appraiser with the hope of influencing his opinion of Fair Market Value for the subject property. "They ask you to do something, and then tell you how to do it" and at what price.
Stand your ground and tell the UW that you did a complete summary appraisal on the date of inspection and that copyrighted appraisal cannot be adjusted or altered. It stands on its own. You are done with that appraisal. He can use it, as is, or order a new appraisal.
I recently had a 10 year veteran loan processor/underwriter (loan pimp) tell me point blank to amend my appraisal and use comparable sale that closed 10 days after date of inspection (which he hoped would influence upward the value of the subject). Guess what I told him.