The Real Estate License Act and NAR’s Code of Ethics prohibit any misleading or false advertisements. If a real estate licensee advertises listings on the Internet and fails to remove the listings within a reasonable period of time after the listing sells, the licensee could be accused of misrepresenting the status of available property in his advertisement. A real estate licensee might be accused of misleading the public to believe that the licensee has an inflated number of listings. Therefore, advertisements on the Internet that concern listed properties should be promptly removed after the listing sells.
Source: Texas Realtors