The Illinois Oath Of Real Estate appraiser is a document that must be signed by all real estate appraisers in the state of Illinois. This document is intended to ensure that the appraiser has a commitment to professional conduct and is held to a higher standard than other real estate professionals. The oath sets forth the appraiser’s duty to act in accordance with the highest ethical standards, to treat all parties fairly and to provide accurate and impartial opinions. It also requires the appraiser to maintain confidentiality of information relating to their appraisal. There are two types of Illinois Oath Of Real Estate appraisers. The first is a Residential Appraisal Signatory which is required for appraisals of single–family dwellings, condominiums, cooperatives, and multi–family dwellings with 1–4 units. The second is a Commercial Appraisal Signatory which is required for appraisals of all other types of real estate.