Knox v. Lee
The Supreme Court ruled that Congress could make paper treasury notes legal tender for both old and new debts, reversing a decision from just a year earlier that had said the same law was unconstitutional as applied to debts made before it passed.
The ruling meant the country's Civil War-era paper currency remained valid money nationwide, avoiding what the Court called ruinous economic disruption, and it established that Congress has broad implied power to manage the nation's currency in times of national necessity.
“we hold the acts of Congress constitutional as applied to contracts made either before or after their passage”
The core holding upholding the Legal Tender Acts for both old and new debts.
How it got here: The Court had ruled the year before in Hepburn v. Griswold that the law was unconstitutional as to pre-existing debts; new justices joined the Court and it agreed to rehear the question in these two cases.
The Case in Depth
What happened
During the Civil War, Congress passed the Legal Tender Acts, authorizing "greenback" paper notes as legal tender for nearly all debts. Two cases arose: one (Knox v. Lee) over a debt from wool sold after the law passed, and another (Parker v. Davis) over a debt from before the law. Creditors argued they were owed payment in gold or silver, not paper notes.
The question before the Court
Could Congress force people to accept paper "greenback" money instead of gold or silver coin to pay off debts, even debts made before the paper money law existed?
Why it matters
The decision meant that millions of dollars in wartime paper currency stayed legally valid for paying debts, sparing debtors and creditors alike from a scramble for scarce gold. It gave Congress lasting authority to issue paper money as legal tender in future emergencies, a power still relied on for U.S. currency today.
What changes now
This was a final merits ruling that immediately overturned the Court's own decision from the year before, Hepburn v. Griswold, so paper legal tender remained valid nationwide going forward. The judgments in both underlying cases were affirmed, meaning the debtors could satisfy their debts with legal tender notes. The ruling has continued to underpin Congress's authority to issue paper currency ever since.
What this does not decide
The Court did not hold that paper money itself has intrinsic value or serves as a fixed "standard of value" like gold and silver coin; it said the notes were only made temporarily equivalent in legal effect to coin. It also left to Congress's discretion how long and under what circumstances such emergency legal-tender power should be used.
Concurrences and dissents
Concurrence — Justice Bradley
Bradley agreed the Legal Tender Acts were constitutional but grounded his reasoning more broadly in the government's inherent sovereign powers, including a right to anticipate revenue through bills of credit as an incident of the power to borrow money. He argued the legal tender quality was a discretionary, incidental feature of issuing government paper, necessary only in extraordinary emergencies like war, and that it should not be exercised beyond what circumstances require.
Dissent — Justice Chase
“We still think, notwithstanding the argument adduced to the contrary, that it does violate an express provision of the Constitution, and the spirit, if not the letter, of the whole instrument.”Chase's central objection that the legal tender law was unconstitutional.
Chase, who had authored the overruled Hepburn v. Griswold decision, argued the legal tender clause was not a necessary and proper means of executing any express power, since the notes could have circulated without compulsion, and that making them legal tender actually signaled government insolvency and hurt their value. He also argued the law impaired contracts and took property without due process, violating the Fifth Amendment, and objected to the majority's theory of undefined 'resulting powers.'
Dissent — Justice Clifford
Clifford argued at length that 'money' in the Constitution means only gold and silver coin, that the Coinage Clause was meant to establish a permanent metallic standard of value, and that decades of unbroken historical practice and prior case law confirmed Congress never had power to make paper a legal tender. He concluded both contract questions were controlled by Hepburn v. Griswold and that judgment should be reversed.
Dissent — Justice Field
Field contended that the power to borrow money does not include power to interfere with third parties' contracts, and that the Coinage Clause's grant of power to make metal coins a tender implicitly excluded any other tender. He argued making notes legal tender for pre-existing debts unconstitutionally impaired contract obligations and that even for later contracts, requiring acceptance of fluctuating paper defeated Congress's duty to maintain a uniform metallic standard of value.
How the Court got there
The legal reasoning, step by step
- The Court applied the test from McCulloch v. Maryland: a law is constitutional if it pursues a legitimate constitutional end through means that are appropriate, not prohibited, and consistent with the Constitution's letter and spirit — courts do not second-guess how necessary Congress judged the means to be.
- The Court reasoned that Congress's powers are not limited to those specifically listed, but include implied 'resulting powers' that arise from the government's overall sovereignty and its need for self-preservation, especially during a national emergency like the Civil War.
- Applying that framework to the wartime crisis — an empty treasury, suspended bank payments, and an army that had to be paid — the Court found that making treasury notes legal tender was an appropriate, adapted means of preserving the government and financing the war.
- The Court rejected the argument that the Coinage Clause impliedly bars Congress from declaring anything but metal to be money, noting Congress has repeatedly exercised implied powers over subjects, like criminal law and banking, beyond its narrowest express grants.
- On the contracts issue, the Court held that a promise to 'pay money' is always made subject to Congress's constitutional power over the currency, so accepting legal tender notes instead of gold does not violate the original contract's obligation.
- Because these acts were appropriate means to a legitimate end and not forbidden by the Constitution's letter or spirit, the Court concluded Congress had not exceeded its authority in making the notes legal tender for debts made either before or after the law's passage.
Doctrinal impact
Cases affected by this decision
Overrules Hepburn v. Griswold (8 Wallace)
Overturned the Court's own decision from the year before that the Legal Tender Act was unconstitutional for pre-existing debts.