Also known as: letter of marque · letters of marque and reprisal · letter of marque and reprisal · marque and reprisal · privateer license
Written by attorneys · grounded in primary & secondary sources — see below
A governmental license authorizing a private citizen or vessel to seize or attack the ships and property of a foreign nation as a form of reprisal.
Lily Lopez owns a merchant ship and seeks permission to capture foreign vessels after a diplomatic breakdown. Congress passes legislation directing the president to issue the required authorization to qualifying private owners. Lily receives the document and begins operations against targeted ships. The action proceeds under federal authority without state involvement.
Lila Lin petitions her state legislature for authority to arm a vessel and seize property from a neighboring nation after a trade dispute. The legislature refuses the request outright. State officials explain that only the federal government may issue such an authorization. The denial prevents any state-level action from occurring.
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Lola Langley operates a private armed vessel and applies for authority after Congress declares war. The president issues the commission allowing her to target enemy goods and vessels. Langley conducts seizures and brings captured property before federal courts for adjudication. The process follows the wartime authorization framework.
Lars Lindstrom and accomplices land on U.S. shores during wartime and claim protections under civilian rules. Authorities detain them and cite congressional power over captures. The court reviews whether the detentions fall within the scope of war powers. The challenge fails because the actions align with established federal authority.
Lance Lee receives a commission from the president to conduct reprisals against foreign shipping. A dispute arises over whether the president may issue such documents without additional legislative steps. The court examines the allocation of war-related powers between branches. The commission stands as a valid exercise of executive authority within congressional grants.
Latoya Lane holds contracts affected by wartime seizure rules tied to federal authorizations. She argues the rules violate state protections against impairment of obligations. The court holds that federal war powers override the state-level contract claim. The seizures proceed under national authority.
Congress holds the exclusive power under Article I, Section 8 to grant letters of marque. The Constitution expressly assigns this authority to the federal legislature rather than the executive or the states. No state may issue such licenses on its own.
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Congress has not issued letters of marque since the nineteenth century. The power remains available under the Constitution but has fallen into disuse following international agreements outlawing privateering.
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Letters of marque authorize specific private reprisals against foreign property without requiring a full declaration of war. A declaration of war triggers broader military powers, while letters of marque focus on targeted private action under congressional grant.
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…officers, and in the making of treaties. A third remains to be mentioned; the right of the legislature to declare war and grant letters of marque and reprisal.' "With these exceptions, the executive power of the United States is completely lodged in the President. This mode of construing the Constitution has indeed been recognized by Congress in…