Definition
The transfer by one party (the assignor) of rights, interests, or property to another party (the assignee), so that the assignee steps into the assignor's position with respect to the thing transferred. Assignment is one of the fundamental mechanisms by which legal and equitable interests change hands outside of sale, gift, or testamentary transfer. Three distinct legal contexts give the term specific shape:
1. Contracts. The transfer of a party's rights under a contract to a third party. The assignor conveys the benefit of the contractual right — the right to receive performance — to the assignee. Assignment of rights is distinguished from delegation of duties: a party may assign rights without necessarily transferring their obligations, though duties may be delegated separately. Not all contractual rights are freely assignable; anti-assignment clauses, personal-service contracts, and certain statutory restrictions limit transferability.
2. Property and Leasehold Interests. In real property, assignment historically denoted the transfer of an entire remaining leasehold interest to a new tenant, as distinguished from a sublease (in which the original tenant retains a reversionary interest). More broadly, assignment encompasses the written transfer of any estate, right, or title in land. Black's Law Dictionary draws the technical boundary: assignment transfers the whole unexpired residue of a term; anything less is a sublease.
3. Assignment for Benefit of Creditors. A formal debtor-creditor mechanism in which an insolvent debtor transfers property to a third-party assignee, who liquidates the assets and distributes proceeds to creditors. A preferential assignment is one that directs payment to named creditors ahead of others — a feature that historically triggered scrutiny under insolvency and fraudulent conveyance law.
Assignment does not include testamentary transfers (transfers by will). That boundary is consistent across virtually all historical and modern authorities.
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Common Language
Modern common usage (Wiktionary): The act of assigning — broadly, the allocation of a task, job, or position to a person; a task given to students; or the categorization of something into a group.
Historical common usage (Webster's 1913): An allotting or appointment to a particular person or use; also a transfer of title or interest by writing, as of a lease, bond, note, or bill of exchange.
The ordinary-language sense of assignment — a homework task, a work assignment, a designated post — shares the root idea of allocation but carries none of the legal weight. In legal usage, assignment is not merely the act of directing something toward someone; it is a legally operative transfer that shifts rights, interests, or property with binding effect on third parties. A researcher who encounters "assignment" in a legal instrument or historical deed should not read it in the colloquial sense.
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Common Confusion
Assignment vs. Sublease: In landlord-tenant law, these are technically distinct. An assignment transfers the tenant's entire remaining interest in the leasehold; the assignee stands in direct privity with the landlord. A sublease retains a reversionary interest in the original tenant, who remains liable to the landlord. Historical sources frequently use the terms loosely, and lease drafters have not always observed the distinction. Researchers should examine the specific transaction structure rather than relying on the label used.
Assignment vs. Delegation: In contract law, assignment transfers rights (what you are owed); delegation transfers duties (what you must perform). A party can assign rights without delegating duties. The conflation of these concepts is a persistent source of error in both historical commentary and modern drafting.
Assignment vs. Novation: An assignment does not release the assignor from liability unless the obligor agrees to substitute the assignee entirely — that substitution is a novation, a separate legal event. Absent novation, the assignor typically remains secondarily liable.
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Recognized Forms
/SUBTYPES
General Assignment for Benefit of Creditors: The debtor transfers all or substantially all non-exempt assets to an assignee for liquidation and pro rata distribution to creditors. A state-law alternative to federal bankruptcy, governed by varying state statutory schemes.
Preferential Assignment: An assignment for benefit of creditors that directs the assignee to pay specified creditors in full before others. Historically disfavored and subject to avoidance under insolvency statutes.
Collateral Assignment: The transfer of an interest in property as security for a debt, without full transfer of ownership. Common in life insurance and intellectual property financing.
Assignment of Lease: Transfer of a tenant's entire leasehold interest to a third party. Subject to landlord consent requirements in most commercial and residential lease agreements.
Assignment of Chose in Action: Transfer of the right to pursue a legal claim. Historically disfavored at common law (maintenance and champerty concerns); now broadly permitted with notable exceptions for certain personal tort claims.
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Why It Matters in Research
The primary research trap is false uniformity. "Assignment" appears across contracts, property, insolvency, and tax law, and the doctrinal rules differ materially by context. A rule about assignability of contract rights does not govern the validity of a leasehold assignment. Material found in a property treatise about assignments may be useless — or misleading — when applied to a commercial contract question.
Historical sources present a second trap: the assignability of choses in action was sharply restricted at common law and evolved substantially through equity and then statute. Bouvier's and Rapalje & Lawrence reflect a body of case law in which specific claims — malicious prosecution, false imprisonment — were held non-assignable even after verdict. Many of those restrictions have been relaxed by modern statute or case law, but the historical sources do not flag their own obsolescence. Researchers using 19th-century dictionary entries as a guide to assignability rules need to verify the current state of the law.
In the assignment-for-benefit-of-creditors context, the relevant law is almost entirely state statutory, and it varies widely. The Bouvier's discussion of how the instrument of assignment must be made — and the rule that a parol assignment may now transfer a deed — reflects a historical loosening of formal requirements that is jurisdiction-specific and date-sensitive.
The tax dimension (Assignment of Income Doctrine) is entirely separate from the contract and property meanings and lives in its own doctrinal world. A researcher encountering "assignment" in a tax context should route directly to the income-assignment materials rather than general contract-law sources.
Anti-assignment clauses in contracts are a live area of commercial practice with their own body of case law. Historical dictionaries are silent on this; it is a modern research domain.
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Historical Dictionary Support
Black's Law Dictionary (1st Ed.) offers the most systematic treatment among the shelf sources, tracking both the broad sense (transfer of any right, interest, or property, real or personal) and the narrower technical sense (transfer of an unexpired leasehold term, distinguished from a lesser interest). The entry explicitly excludes testamentary transfers from the concept — a boundary point that all modern authorities maintain.
Bouvier's Law Dictionary adds practical depth on two fronts: the rules governing how an assignment must be made (with attention to the historical requirement of instrument parity and its relaxation), and the catalogue of non-assignable claims. Bouvier's treatment of preferential assignments and their relationship to insolvency law situates the term in its creditor-rights context.
Rapalje & Lawrence's cross-references to ASSIGNEE, BANKRUPTCY, and INSOLVENCY signal what the editors regarded as the term's most legally active neighborhoods in the late 19th century. The note that an executor is not an assignee in certain statutory contexts is a reminder that definitional questions about assignment often turn on how a specific statute uses the word.
Webster's 1913 is notably useful here: its definition tracks legal usage fairly closely, including reference to the assignment of a bankrupt's property to assignees — evidence that the insolvency sense of the word had fully entered general educated usage by that date.
None of the historical dictionaries address anti-assignment clauses as a drafting phenomenon, the UCC's treatment of assignment, or the assignment-of-income doctrine in tax law. These are gaps the researcher must fill from modern sources.
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Jurisdictional Note
Assignment for benefit of creditors is governed by state law and varies significantly in procedural structure, creditor rights, and the treatment of preferences. Some states have detailed statutory schemes; others operate largely under common law. Federal bankruptcy law coexists with — and in cases of conflict may preempt — state assignment-for-benefit-of-creditors proceedings. For leasehold assignment, state landlord-tenant statutes and local residential lease regulations layer over common law rules in ways that differ materially across jurisdictions.
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Encyclopedia Cross-Reference
Assignment of Rights — Anti-Assignment Clauses (The Law Mind Contracts & Commercial Law Encyclopedia)
Assignment of Income Doctrine (The Law Mind Tax Encyclopedia)
Landlord-Tenant — Assignment and Subletting (The Law Mind Property Law Encyclopedia)
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