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Uniform Commercial Code rules for checks, wires and LCs
First published 1952· Law or rule
Fact, law or dataA rule, statute, definition or measured number.
The model state law, adopted everywhere, that sets who pays and who loses when a check, wire or letter of credit goes wrong.
See it on the Money & Finance map →How it works
The American Law Institute and the Uniform Law Commission first published the Uniform Commercial Code in 1952; Pennsylvania adopted it first, and every state but Louisiana had by the late 1960s, and Louisiana later adopted parts. Article 3 covers checks, drafts and notes; Article 4 covers bank check collection, including the 'midnight deadline' to return a bad check; Article 4A (1989) covers business wire transfers; Article 5 covers letters of credit. Federal rules such as Regulations CC and J sit on top.
Why it matters
It decides the loss in fraud cases: for example, a bank that follows an agreed security procedure can usually charge its customer for a fraudulent wire.
Facts, rules and data
The official UCC text and comments from the ALI and Uniform Law Commission, each state's enacted version (in California, the Commercial Code), and decades of case law on checks, wires and letters of credit.
Debates and risks
Whether Article 4A, written for 1989 bank wires, fits email fraud and instant payments, and how the 2022 amendments for digital assets will work in practice.
Connections (3)
▸Checks: how a personal or business check clears are governed by Articles 3 and 4 of Uniform Commercial Code rules for checks, wires and LCsFact, law or data
The connection
Article 3 sets who must pay a check and what an endorsement does, and protects a 'holder in due course' who takes one in good faith. Article 4 governs collection: the paying bank must return a bad check by midnight of the next banking day, and losses from forged signatures or endorsements are assigned among customers and banks.
When and why
In every state's commercial code since the 1950s–60s, with a major revision in 1990; federal Regulation CC adds fund-availability and return rules.
How we know
The UCC text and official comments, state enactments such as California Commercial Code Divisions 3 and 4, and many court cases over forged and altered checks.
Debates and risks
How liability should split as check fraud surges; courts and banks disagree on when a customer's careless check handling shifts the loss to the customer.
▸Wire transfers: same-day, final and hard to reverse are governed by Article 4A of Uniform Commercial Code rules for checks, wires and LCsFact, law or data
The connection
Article 4A treats a business wire as a chain of payment orders. A bank that follows an agreed, commercially reasonable security procedure can charge the customer even for a fraudulent order. The receiving bank may credit by account number alone, even if the name differs. Once the beneficiary's bank accepts, the payment is final.
When and why
Written in 1989 by the Uniform Law Commission and the ALI and adopted in every state by the 1990s; Regulation J applies it to Fedwire and FedNow.
How we know
UCC sections 4A-202 to 4A-207, the Fed's Regulation J, and court cases on hacked accounts such as Patco Construction v. People's United Bank (2012).
Debates and risks
Whether the name-mismatch and security-procedure rules leave businesses carrying too much of the email-fraud loss is debated by banks and their customers.
▸Commercial letters of credit (UCP 600) and confirmed LCs fall under Article 5 of Uniform Commercial Code rules for checks, wires and LCsFact, law or data
The connection
Most international LCs say they follow the ICC's UCP 600, but US law still governs where those rules are silent. Article 5 sets the independence principle (the bank's promise stands apart from the sales contract), a maximum of seven business days to examine documents, and a narrow fraud exception that lets a court halt payment.
When and why
Revised Article 5 approved in 1995 and adopted by the states, building on cases such as Sztejn v. J. Henry Schroder Banking Corp. (New York, 1941).
How we know
UCC sections 5-103, 5-108 and 5-109, and the Sztejn case, where a seller shipped rubbish instead of the bristles ordered.
Debates and risks
How strict 'strict compliance' should be: courts and banks keep disputing whether small typos in documents justify refusing payment.