Negotiable Instruments Act Article 91

Notice of dishonor may be given by any means of communication, provided that the person who asserts that they have given notice within the time limit set forth in Article 89 shall bear the burden of proof.When notice is sent by post, if the address of the domicile of the person to be notified is correctly specified on the envelope, notice is deemed to have been given.
中文原文 票據法第91條
通知得用任何方法為之。
但主張於第八十九條所定期限內曾為通知者,應負舉證之責。
付郵遞送之通知,如封面所記被通知人之住所無誤,視為已經通知。

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