Each state has its own laws and regulations which govern whether or not you need an auctioneers license to sell items via online auction. If you are a professional estate liquidator, then you should refer to our guide to auction license laws, which describes auction laws by state to see if you need to obtain an auctioneers license prior to conducting an online auction. Private individuals typically do not need an auctioneers license if they are selling items from their own estate.