Jo Ann
Thanks for your comments. You are right, we usually see eye to eye on most topics.
My point is that the requirement in USPAP for any data collection, verification and the analysis of the data is determined by the scope of work.
USPAP 2002 line 637-639 says " collect, verify, and analyze all information applicable to the appraisal problem, given the scope of work identified" in the specific assignment. We know that the scope is determined by the client, any intended users, the intended use of the work product and the purpose for which the work product is requested. The scope of work is measured "by the expectations of market participants for the same or similar appraisal assignments; and what the appraiser's peers actions would be in the same or similar assignments." USPAP 2002 lines 594 - 598).
So, if you are doing lending work, and the accepted guidelines are lending, typically you would have two sources. But those guidelines are not the same for other types of work. Hence the example I used in the prior post.
Another example, if I am asked to provide a statistical analysis of a certain population of data, using say 600 sales in a region of my home town, to determine if property values of a particular category (or style) of homes were increasing or not, I would probably select MLS data as represented by the brokers electronically. I would not verify each sale independently, nor would I expect any of my peers to verify each sale if he developed such a model. If another appraiser was selected to do the same assignment, and he selected 6 sales based on his judgment to represent the sample market, I would expect pertinent information for each sale to be verified. If I were doing the same work for litigation, I would double check the MLS with tax data and any other available source I could get.
I do not disagree with your basic premise that for the typical residential lending work two sources are usually adequate; typically my market uses MLS and county records as the two sources. I am not certain personal verification is required. In my market, personal contact is only accomplished if the verification develops contradiction or other issues are present. Then additional investigative work is done or the sale is rejected as not being reliable.
Thanks again for your comments
Tom Hildebrandt GAA