Regulations Governing the Licensing of Images and Publications of the National Palace Museum Article 9

The applicant is required to pay 20% of the royalties as the performance bond fee when signing the licensing agreement or affidavit unless the amount of performance bond fee is less than NT$3,000.The performance bond fee mentioned in the preceding paragraph shall be returned without interest when the applicant performs accordingly to the agreement. If an applicant fails to perform as agreed, in addition to confiscation of the performance bond, Article 10 shall also apply.
中文原文 國立故宮博物院藏品圖像授權及出版授權利用辦法第9條
申請人於簽訂授權契約或授權切結書時,應繳交本院履約保證金,其數額按繳交權利金之百分之二十計算;未達新臺幣三千元者,得免收之。
前項履約保證金,於申請人依約履行完畢後無息退還;未依約履行,除沒收履約保證金外,並視情節依第十條規定辦理。

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