noun
bill of exchange; draft
A financial instrument used in trade and banking, ordering payment of a specified sum at a given time.
輸出業者は為替手形を銀行に持ち込んだ。
The exporter took the bill of exchange to the bank.
約束手形 is a promissory note (a promise to pay), while 為替手形 is a bill of exchange (an order to a third party to pay).
Compound of 為替 (かわせ, 'money exchange') and 手形 (てがた, 'draft, note').