Land Administration Agent Act Article 25

A Land Administration Agent shall keep a record which states the process of entrusted cases.The record stated in the provision of the previous Item shall be kept for at least 15 years.
中文原文 地政士法第25條
地政士應置業務紀錄簿,記載受託案件辦理情形。
前項紀錄簿,應至少保存十五年。

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