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[Latin, He undertook or he promised.] A promise by which someone assumes or undertakes an obligation to another person. The promise may be oral or in writing, but it is not under seal. It is express when the person making the promise puts it into distinct and specific language, but it may also be implied because the law sometimes imposes obligations based on the conduct of the parties or the circumstances of their dealings.

Assumpsit was one of the common-law Forms of Action. It determined the right to sue and the relief available for someone who claimed that a contract had been breached.

When the Common Law was developing in England, there was no legal remedy for the breach of a contract. Ranulf Glanvill, a famous legal scholar, wrote just before the year 1200 that "[i]t is not the custom of the court of the lord king to protect private agreements, nor does it concern itself with such contracts as can be considered private agreements." Ordinary lawsuits could be heard in local courts, but the king was primarily interested in royal rights and the disputes of his noblemen. As commerce began to develop, the king's courts did allow two forms of action for breach of contract—the actions of Covenant and debt. Covenant could be maintained only if the agreement had been made in writing and under seal and only if the action of debt was not available. One could sue on the debt only if the obligations in the contract had been fully performed and the breach was no more than a failure to pay a specific sum of money.

Finally, in 1370, a plaintiff sought to sue a defendant who had undertaken to cure the plaintiff's horse but treated it so negligently that the horse died, and the action was allowed. In 1375, another man was permitted to sue a surgeon who had maimed him while trying to cure him. These cases showed a new willingness to permit a lawsuit for monetary damages arising directly from the failure to live up to an agreement. For the next hundred years the courts began to allow lawsuits for badly performed obligations but not for a complete failure to perform what was required by contract. Unexpectedly, this restriction was abandoned also, and a new form of action was recognized by the courts, an action in special assumpsit for breach of an express agreement.

Special assumpsit gave a new legal right to parties who could not sue on a debt. Gradually, it became possible to sue in assumpsit if the defendant owed a debt and then violated a fresh promise to pay it. This action came to be known as indebitatus assumpsit, which means "being indebted, he promised."

As time passed, courts were willing to assume that the fresh promise had been made and to impose obligations as if it had. This allowed lawsuits for a whole range of contract breaches, not just those recognized by an action on the debt or in special assumpsit. If the plaintiff could claim that services had been performed or goods had been delivered to the defendant, then the law would assume that the defendant had promised to pay for them. Any failure to do so gave the plaintiff the right to sue in assumpsit. This development allowed such a wide range of lawsuits based on promises to private parties that it came to be known as general assumpsit.

Eventually, the right to sue was extended even to situations where the defendant had no intention to pay but it was only fair that he or she be made to do so. This form was called assumpsit on quantum meruit. Special assumpsit, general assumpsit (or indebitatus assumpsit), and quantum meruit are all ex contractu, arising out of a contract. Their development is the foundation of our modern law of contracts.


Quantum Meruit.


a voluntary promise made by words, an old form of action abolished by the Judicature Act 1925. Modern theoretical writings refer to one of its grounds, indebitatus assumpsit, an action for breach of an undertaking, either to do or pay something.

ASSUMPSIT, contracts. An undertaking either express or implied, to perform a parol agreement. 1 Lilly's Reg. 132.
     2. An express assumpsit is where one undertakes verbally or in writing, not under seal, or by matter of record, to perform an act, or to pa a sum of money to another.
     3. An implied assumpsit is where one has not made any formal promise to do an act or to pay a sum of money to another, but who is presumed from his conduct to have assumed to do what is in point of law just and right; for, 1st, it is to be presumed that no one desires to enrich himself at the expense of another; 2d, it is a rule that he who desires the antecedent, must abide by the consequent; as, if I receive a loaf of bread or a newspaper daily sent to my house without orders, and I use it without objection, I am presumed to have accepted the terms upon which the person sending it had in contemplation, that I should pay a fair price for it; 3d, it is also a rule that every one is presumed to assent to what is useful to him. See Assent

ASSUMPSIT, remedies, practice., A form of action which may be defined to be an action for the recovery of damages for the non-performance of, a parol or simple contract; or, in other words, a contract not under seal, nor of record; circumstances which distinguish this remedy from others. 7 T. R. 351; 3 Johns. Cas. 60. This action differs from the action of debt; for, in legal consideration, that is for the recovery of a debt eo nomine, and in numero, and may be upon a deed as well as upon any other contract. 1 h. Bl. 554; B. N. P. 167. If differs from covenant, which, though brought for the recovery of damages, can only be supported upon a contract under seal. See Covenant.
     2. It will be proper to consider this subject with reference, 1, to the contract upon which this action may be sustained; 2, the declaration 3, the plea; 4, the judgment.
     3.-1. Assumpsit lies to recover damages for the breach of all parol or simple contracts, whether written or not written express or implied; for the payment of money, or for the performance or omission of any other act. For example, to recover, money lent, paid, or had and received, to the use of the plaintiff; and in some cases, where money has been received by the defendant, in consequence of some tortious act to the plaintiff's property, the plaintiff may waive the tort, and sue the defendant in assumpsit. 5 Pick. 285; 1 J. J. Marsh. 543 3 Watts, R. 277; 4 Binn. 374; 3 Dana, R. 552; 1 N. H. Rep. 151; 12 Pick. 120 4 Call. R. 461; 4 Pick. 452. It is the proper remedy for work and. labor done, and services rendered 1 Gill, 95; 8 S. & M. 397 2 Gilman, 1 3 Yeates, 250 9 Ala. 788 but such work, labor, or services, must be rendered at the request, express or implied, of the defendant; 2 Rep. Cons. Ct. 848; 1 M'Cord, 22; 20 John. 28 11 Mass. 37; 14 Mass. 176; 5 Monr. 513 1 Murph. 181; for goods sold and delivered; 6 J. J. Marsh. 441; 12 Pick. 120; 3 N. H. Rep. 384; 1 Mis. 430; for a breach of promise of marriage. 3 Mass. 73 2 Overton, 233 2 P. S. R. 80. Assumpsit lies to recover the purchase money for land sold; 14 Johns. R. 210; 14 Johns. R. 162; 20 Johns. R. 838 3 M'Cord, R. 421; and it lies, specially, upon wagers; 2 Chit. Pl. 114; feigned issues; 2 Chit. Pl. 116; upon foreign judgments; 8 Mass. 273; Dougl. 1; 3 East, 221; 11 East, 124; 3 T. R. 493; 5 Johns. R. 132. But it will not lie on a judgment obtained in a sister state. 1 Bibb, 361 19 Johns. 162; 3 Fairf. 94; 2 Rawle, 431. Assumpsit is the proper remedy upon an account stated. Bac. Ab. Assumpsit, A. It will lie for a corporation, 2 Lev. 252; 1 Camp. 466. In England it does not lie against a corporation, unless by express authority of some legislative act; 1 Chit. Pl. 98; but in this country it lies against a corporation aggregate, on an express or implied promise, in the same manner as against an individual. 7 Cranch, 297 9 Pet. 541; 3 S. & R. 117 4 S. & R. 16 12 Johns. 231; 14 Johns. 118; 2 Bay, 109 1 Chipm. 371, 456; 1 Aik. 180 10 Mass, 397. But see 3 Marsh. 1; 3 Dall. 496.
     4.-2. The declaration must invariably disclose the consideration of the contract, the contract itself, and the breach of it; Bac. Ab. h.t. F 5 Mass. 98; but in a declaration on a negotiable instrument under the statute of Anne, it is not requisite to, allege any consideration; 2 Leigh, R. 198; and on a note expressed to have been given for value received, it is not necessary to aver a special consideration. 7 Johns. 321. See Mass. 97. The gist of this action is the promise, and it must be averred. 2 Wash. 187 2 N. H. Rep. 289 Hardin, 225. Damages should be laid in a sufficient amount to cover the real amount of the claim. See 4 Pick. 497; 2 Rep. Const. Ct. 339; 4 Munf. 95; 5 Munf. 23; 2 N. H. Rep. 289; 1 Breese, 286; 1 Hall, 201; 4 Johns. 280; 11 S. & R. 27; 5 S. & R. 519 6 Conn. 176; 9 Conn. 508; 1 N. & M. 342; 6 Cowen, 151; 2 Bibb, 429; 3 Caines, 286.
     5.-3. The usual plea is non-assumpsit, (q.v.) under which the defendant may give in evidence most matters of defence. Com. Dig. Pleader, 2 G 1. When there are several defendants they cannot plead the general issue severally; 6 Mass. 444; nor the same plea in bar, severally. 13 Mass. 152. The plea of not guilty, in an action of assumpsit, is cured by verdict. 8 S. & R. 541; 4 Call. 451. See 1 Marsh, 602; 17 Mass. 623. 2 Greenl. 362; Minor, 254 Bouv. Inst. Index, h.t.
     6.-4. Judgment. Vide Judgment in Assumpsit. Vide Bac. Ab. h.t.; Com. Dig. Action upon the Case upon Assumpsit; Dane's Ab. Index, h.t.; Viner's Ab. h.t.; 1 Chit. Pi. h.t.; Petersd. h.t.; Lawes Pl. in Assumpsit the various Digests, h.t. Actions; Covenant; Debt; Indebitatus assumpsit; Padum Constitutiae pecuniae.

References in periodicals archive ?
270) Assumpsit means quasi-contract, that is, an implied contract between the plaintiff and defendant.
55) However, in regard to the Interstar decision, the High Court notes that the Court of Appeal: 'rather than acknowledging the concurrent administration in New South Wales (as elsewhere) of law and equity, appears to treat the penalty doctrine as having disappeared from equity by absorption into the common law action of assumpsit.
law recognized ten: debt, detinue, covenant, special assumpsit, general
Gould en 1705-07 (90) et refusa egalement en 1702 la possibilite d'accorder un assumpsit sur la vente d'un esclave noir en Angleterre.
The pleader, moreover, had to shoehorn the facts of his case into one of the limited forms of action, such as trespass, covenant, and assumpsit.
419 (1793), Iredell urged in dissent that, absent congressional legislation, the State of Georgia should be immune in a suit for assumpsit brought by an individual, unless something "peculiar" to the law of Georgia allowed for it, or if principles "common to all the States" (including, presumably, Georgia), did so.
Act, unjust enrichment and assumpsit for monies received as a result of
be certainly seen, and such as are ideal, as between assumpsit, trespass
Vaporis enim nomen inducens hoc ideo de rebus corporalibus assumpsit, ut vel ex parte aliqua intelligere possimus quomodo Christus, qui est Sapientia, secundum similitudinem eius vaporis qui de substantia aliqua corporea procedit, sic etiam ipse ut quidem vapor exoritur de virtute ipsius Dei.
The situations Jonson dramatizes reflect variously the doctrine of assumpsit as it was given a definitive form in Slade's case, in which a promise, or a stated intention to perform an action, was held to be knowable and binding upon the promissor.