A bill of exchange is a signed, written order from one party telling another party to pay a fixed sum of money, either on demand or at a specified future date. The seller (or another creditor) writes and signs it, the buyer is directed to pay, and once the buyer signs to accept it, the document becomes a binding, transferable payment obligation. In U.S. commercial law, Article 3 of the Uniform Commercial Code calls the instrument a “draft,” but “bill of exchange” remains standard in international trade. Its practical purpose is simple: it lets a seller extend short-term credit to a buyer while holding paper that can be sold for cash right away.
The Parties on the Instrument
Three roles show up on every bill. The drawer creates and signs the order to pay; in a trade deal, that’s almost always the seller. The drawee is the party ordered to pay, typically the buyer who received the goods. The payee is whoever is entitled to collect. The drawer and payee are often the same person, but the drawer can name someone else, such as a bank that financed the shipment.
A fourth label matters once payment is committed. When the drawee signs the bill and agrees to pay, that party becomes the acceptor. Before acceptance, the bill is a request. After acceptance, it’s a promise.
A fifth role sometimes appears in trade finance: an accommodation party, essentially a co-signer. Under U.S. law, an accommodation party signs the bill without directly benefiting from the underlying deal, purely to back someone else’s obligation, and owes the same duty as the party they’re backing. If the accommodation party pays, they can seek reimbursement from the person they helped.1Legal Information Institute. UCC 3-419 – Instruments Signed for Accommodation A bank or parent-company co-signature is common when the buyer’s own credit isn’t strong enough to make the bill attractive on the secondary market.
A Worked Example
AutoParts Inc., a U.S. importer, buys $150,000 worth of components from Metallbau GmbH in Germany. Metallbau agrees to ship the goods and give AutoParts 90 days to pay.
Metallbau draws up a bill of exchange for $150,000 payable “90 days after sight,” naming AutoParts as the drawee. The bill travels with the shipping documents through the banking channel. AutoParts reviews the paperwork, signs to accept the bill, and now has a firm obligation to pay $150,000 in 90 days.
Metallbau doesn’t want to wait three months for cash. It endorses the accepted bill to Deutsche Bank at a discount, collecting roughly $148,200 immediately. Deutsche Bank now holds the bill. On day 90, the bank presents it to AutoParts, which pays the full $150,000. The bank keeps the $1,800 spread.
Metallbau got paid almost right away. AutoParts got 90 days to receive and resell the parts before paying. Deutsche Bank earned a return on a short-term instrument backed by a specific trade obligation.
How the Bill Moves From Creation to Payment
The drawer prepares the bill, naming the drawee and payee and stating the amount and due date. In international trade, the bill usually travels through the banking system alongside shipping documents rather than passing directly to the buyer. The payee or the payee’s bank presents the bill to the drawee, who accepts it by signing.
Once accepted, the bill is a tradeable asset. The payee can endorse it to a bank or investor at a discount, turning a future receivable into cash today. Anyone who buys the bill becomes its new holder and, if certain conditions are met, gets stronger legal rights than the original seller had.
On the due date, whoever holds the bill presents it to the acceptor for payment. If the acceptor pays, the bill is discharged. If not, the bill is “dishonored,” and a separate set of rules kicks in.
Common Types
Sight Drafts and Time Drafts
The clearest split is when payment is due. A sight draft (or demand draft) requires payment the moment it’s presented. Sellers use these when they aren’t willing to extend any credit. A time draft, sometimes called a usance bill, sets a future payment date such as “30 days after sight” or “60 days from date of issue.” Time drafts dominate international trade because they give the buyer room to receive, inspect, and often resell the goods before paying.
Trade Acceptances and Banker’s Acceptances
A trade acceptance is a time draft that a commercial buyer has accepted. Its value on the secondary market depends entirely on that buyer’s credit.
A banker’s acceptance is a time draft where a bank steps in as the acceptor, substituting its credit for the buyer’s. The bank stamps the draft “accepted” and guarantees payment at maturity whether or not the buyer reimburses it. Banker’s acceptances trade at a discount from face value like Treasury bills, and the discount depends on the accepting bank’s size and reputation, with acceptances from major money-center banks trading at the tightest spreads.2Federal Reserve Bank of New York. Bankers Acceptances
How It Differs From a Promissory Note or a Check
All three are negotiable instruments under UCC Article 3, but they work differently.
A promissory note is a promise to pay, made by the person who owes the money. The borrower creates it and signs it. Two parties are involved: the maker who promises and the payee who receives. Notes are common in lending, including mortgage notes.
A bill of exchange is an order to pay, created by the person who is owed the money. The creditor writes it and directs someone else to pay. Three parties are involved. Bills dominate trade finance.
A check is actually a specific kind of draft. Under the UCC, a check is a draft drawn on a bank and payable on demand.3Legal Information Institute. UCC 3-104 – Negotiable Instrument Every check is a bill of exchange, but not every bill of exchange is a check. Checks are always payable on demand and always drawn on a bank; a time draft drawn on a commercial buyer is a bill of exchange but not a check.
What the Document Has to Say to Be Valid
A document that misses any formal requirement isn’t a negotiable instrument and loses the special legal protections that go with that status. Under UCC Article 3, the instrument must be a written, signed order to pay; the order must be unconditional; the amount must be a fixed sum of money; the bill must be payable on demand or at a definite time; it must be payable to bearer or to order; and it cannot require the paying party to do anything beyond paying money.3Legal Information Institute. UCC 3-104 – Negotiable Instrument
The unconditional part is where many drafts fail. A document that says “pay $50,000 if the goods pass inspection” is not a bill of exchange. The bill can reference the underlying deal (“for delivery of auto parts per contract #4412”), but payment cannot depend on performance of that contract. Similarly, adding a non-monetary obligation such as “pay $50,000 and deliver a status report by March 15” disqualifies the document.
A document that meets every requirement except the “payable to bearer or to order” language is still enforceable, but it won’t qualify as a fully negotiable instrument, which limits the legal rights of later holders.3Legal Information Institute. UCC 3-104 – Negotiable Instrument
What Happens if the Buyer Doesn’t Pay
Dishonor occurs when the drawee refuses to accept the bill or to pay when it comes due. A demand draft is dishonored if it isn’t paid on the day of presentment; a time draft is dishonored either by refusal to accept it before maturity or refusal to pay it when due.4Legal Information Institute. UCC 3-502 – Dishonor
When a bill is dishonored, the holder must notify the drawer and any endorsers. Without proper notice of dishonor, the holder loses the ability to enforce those parties’ backup obligations. A bank handling the bill for collection must send notice before midnight of the next banking day; anyone else has 30 days.5Legal Information Institute. UCC 3-503 – Notice of Dishonor
Once dishonor and notice are handled, the drawer becomes liable to pay the holder the full amount, or to reimburse any endorser who already paid. By drawing the bill, the drawer effectively promised that if the drawee didn’t pay, the drawer would.6Legal Information Institute. UCC 3-414 – Obligation of Drawer
For international bills, a formal “protest” is often required. A protest is a certificate of dishonor issued by a notary public or U.S. consul, officially documenting that the bill was presented and refused. In court, a properly executed protest creates a legal presumption that the dishonor occurred as described.7Legal Information Institute. UCC 3-505 – Evidence of Dishonor
There are deadlines for suing. For an unaccepted draft, the holder must file within three years after dishonor or ten years after the date on the draft, whichever comes first. For an accepted draft with a stated due date, the deadline is six years after that due date.8Legal Information Institute. UCC 3-118 – Statute of Limitations
Why Anyone Buys These From the Original Seller
The reason banks are willing to pay cash today for a bill that matures in 90 days is the “holder in due course” doctrine. If you acquire an accepted bill in good faith, for value, and without knowing about any defects or disputes, you get stronger rights than the original payee had. Most defenses the drawee could have raised against the seller, including complaints about defective goods, cannot be raised against you.9Legal Information Institute. UCC 3-305 – Defenses and Claims in Recoupment
To qualify under UCC 3-302, the bill can’t show obvious signs of forgery or tampering, you must have paid value, you must have acted in good faith, and you must not have known the bill was overdue, dishonored, or subject to competing claims.10Legal Information Institute. UCC 3-302 – Holder in Due Course
A narrow set of “real defenses” survive even against a holder in due course: fraud so severe the signer didn’t know what they were signing, incapacity, duress, illegality, and discharge in bankruptcy. Those exceptions aside, holder in due course status is what makes accepted bills reliable enough for banks to buy at a modest discount.9Legal Information Institute. UCC 3-305 – Defenses and Claims in Recoupment
Electronic Bills of Exchange
Paper has dominated trade finance for centuries, but digital versions are gaining legal footing. The core problem has always been replicating “possession” electronically. A paper bill can only be in one person’s hands at a time, which prevents double-spending. An electronic file can be copied endlessly, which breaks that model.
The UNCITRAL Model Law on Electronic Transferable Records (MLETR), adopted in 2017, provides the international legal framework for solving this. Under MLETR, an electronic record is the equivalent of a paper bill if a reliable method establishes exclusive control over the record, identifies who holds that control, and maintains the record’s integrity from creation through payment or expiration. The framework is technology-neutral, accommodating distributed ledgers, token-based systems, or centralized registries.11United Nations Commission on International Trade Law (UNCITRAL). UNCITRAL Model Law on Electronic Transferable Records
As of 2025, over a dozen jurisdictions have enacted MLETR-based or MLETR-influenced legislation, including the United Kingdom (2023), Singapore (2021), France (2024), and Abu Dhabi Global Market (2021). The United States has not adopted MLETR-based legislation at the federal level, though existing UCC provisions and the federal E-SIGN Act give some foundation for electronic commercial instruments.12United Nations Commission on International Trade Law (UNCITRAL). Status – UNCITRAL Model Law on Electronic Transferable Records Electronic bills that meet MLETR standards can be created, transferred, and presented in minutes rather than days, with an auditable chain of control. As more trading jurisdictions adopt the framework, the shift from paper to electronic is likely to accelerate.