Each listed company is required to appoint two high-ranking officers as authorized persons to communicate with the Exchange on information disclosure. Firms are urged to contact SET's Listing Department whenever problems are encountered or anticipated, or, if needed, to seek clarification of SET's regulations. Advance consultation enhances effective liaison between companies and SET.

Furthermore, if there is unusual trading in securities or if important information, which may affect a securities' trading price or investors' decisions, has not been disclosed. SET may request that contact person to clarify the material facts or any important change, affecting to the securities trading. This is to ensure that investors are informed the formal information by the company directly.