Standards for Redemption of Soiled or Mutilated Currency Notes and Coins Unfit for Circulation Article 6
Coins may not be redeemed under any of the following circumstances:（1）Where they are deliberately damaged.（2）Where they have been voided.（3）Where they have been deliberately punched, stamped, or imprinted such that they are reduced in weight or deformed.（4）Where they have been charred, burned, water-soaked, oil-stained, smeared, or eroded, such that the coin cannot be authenticated.
中文原文 污損破損不適流通之紙幣及硬幣收兌標準第6條
硬幣有下列情形之一者，不予收兌：
一、故意損壞。
二、已作廢之硬幣。
三、故意鑿蓋硬印戳記，致重量減少或形式改變。
四、經火燻、火焚、水漬、油漬、塗染、腐蝕或其他情事，致不能辨認真偽。
一、故意損壞。
二、已作廢之硬幣。
三、故意鑿蓋硬印戳記，致重量減少或形式改變。
四、經火燻、火焚、水漬、油漬、塗染、腐蝕或其他情事，致不能辨認真偽。