In some areas, data collectors are hired by appraisal management companies (AMCs) to complete the home/site visit. These data collectors are not certified appraisers. Background checks and adherence to strict professional and ethical standards are required for appraisers. At this time, the same does not apply for data collectors.
Check out the article from the National Association of REALTORS to learn more about what’s changed in the data collection process for appraisals.
https://www.nar.realtor/appraisal-valuation/appraisal-data-collectors-what-you-should-know