Negotiable Instruments Act Article 89

The holder shall notify the endorser or endorsers, the drawer, and all other persons liable for the bill of the dishonor within 4 days after the protest is made.If there is a waiver of protest by special agreement, the holder shall give the notice referred to in the preceding paragraph within 4 days after dishonor by non-acceptance or non-payment.An endorser shall, in turn, notify the party prior to them within 4 days after receiving the notice referred to in the preceding paragraph.If the address of an endorser's domicile is not indicated on the bill, or if, albeit indicated, it is not clearly written and therefore indiscernible, the notice intended for the endorser shall be addressed to the party prior to them.
中文原文 票據法第89條
執票人應於拒絕證書作成後四日內,對於背書人、發票人及其他匯票上債務人,將拒絕事由通知之。
如有特約免除作成拒絕證書時,執票人應於拒絕承兌或拒絕付款後四日內,為前項之通知。
背書人應於收到前項通知後四日內,通知其前手。
背書人未於票據上記載住所或記載不明時,其通知對背書人之前手為之。

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