Negotiable Instruments Act Article 58

A guarantor or guarantors may be provided to guarantee the liabilities on a bill.Any person or persons, except for a person already liable for the bill, may become the guarantor or guarantors referred to in the preceding paragraph.
中文原文 票據法第58條
匯票之債務,得由保證人保證之。
前項保證人,除票據債務人外,不問何人,均得為之。

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