Code of Civil Procedure Article 358
A private document is presumed to be authentic if it is signed by the person in whose name the document is issued or by his/her agent; or is imprinted with the seal or fingerprint of such person or agent; or bears the notarization by the court or a notary.Where a party states that he/she has no knowledge or memory with regard to whether he/she signed or impressed his/her seal or fingerprint in the document, the court may in its discretion, determine whether such document should be presumed to be authentic.
中文原文 民事訴訟法第358條
私文書經本人或其代理人簽名、蓋章或按指印或有法院或公證人之認證者，推定為真正。
當事人就其本人之簽名、蓋章或按指印為不知或不記憶之陳述者，應否推定為真正，由法院審酌情形斷定之。
當事人就其本人之簽名、蓋章或按指印為不知或不記憶之陳述者，應否推定為真正，由法院審酌情形斷定之。