The Anti-Corruption Informant Rewards and Protection Regulation Article 13

The Prosecutors office, judicial police authority or a civil service ethics institution shall install a dedicated phone, answering machine, mailbox, fax machine or other communication equipment for reporting of corruption and malfeasance cases.
中文原文 獎勵保護檢舉貪污瀆職辦法第13條
檢察機關、司法警察機關或政風機構應設置專用電話、答錄機、信箱、傳真機或其他通訊設備,以利檢舉貪污瀆職案件。

English translation for reference only; the Chinese text prevails. Not legal advice.