This party refers to the party that already exists when the bill is made and delivered. It is the necessary subject that constitutes the legal relationship of the bill, including the issuer (issuer), the payee and the payee.

(l) Invoicer. The invoicer refers to the person who signs the bill and issues the bill, or the person who issues the bill.

(2) Payer. The payee is the person entrusted by the invoicer to pay. In some cases, the invoicer is also the payer, such as a promissory note.

(3) Payee. The payee is the person who receives the instrument from the invoicer and has the right to request payment from the payee.