A comp check (also known as a "look-up") is a request made to a state licensed or certified real estate appraiser, sometimes to assure a minimum opinion of value before an order (typically for lending purposes), is placed.
Because providing an opinion of value is the definition of an appraisal in the United States, the practice of the look-up, when excess care is not taken, runs a greater risk of being in violation of the Uniform Standards of Professional Appraisal Practice (USPAP) than an assignment with a more thorough Scope of Work.
[clarification needed] [1] Due to the Financial Institutions Reform, Recovery, and Enforcement Act of 1989 licensed and certified real estate appraisers in the United States who are involved in a federally related transaction are required to follow federally accepted, uniform standards, known as USPAP, which are promulgated by the Appraisal Standards Board of the Appraisal Foundation.
[2] In the Appraisal Foundation's "Advisory Opinion 19" (AO-19) [3] the Appraisal Foundation makes clear the following: An appraiser must not accept an assignment that includes the reporting of predetermined opinions and conclusions, and further, the Management section of the Ethics Rule in USPAP states: