Negotiable Instruments Act Article 25

The drawer may make themself or the drawee the payee and may also make themself the drawee.The holder of a bill that does not specify the payee may specify themself or any other person as the payee in the margin of the bill payable to the bearer, thereby altering it to a bill payable to order
中文原文 票據法第25條
發票人得以自己或付款人為受款人,並得以自己為付款人。
匯票未載受款人者,執票人得於無記名匯票之空白內,記載自己或他人為受款人,變更為記名匯票。

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