Ask anyone who has worked in MLS The Multiple Listing Service (MLS) is a database of property listings that allows agents and brokers in a local area to share information and services and to market their listings to a wider audience. “ href=”https://realtyna.com/glossary/mls/” target=”_blank” data-gt-translate-attributes=’[{“attribute”:”data-cmtooltip”, “format”:”html”}]’ tabindex=’0’ role=’link’>MLS compliance how enforcement usually happens and you’ll hear a familiar story. A complaint comes in.