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See: guarantor, surety

PROMISOR. One who makes a promise.
     2. The promisor is bound to fulfill his promise, unless when it is contrary to law, as a promise to steal or to commit an assault and battery; when the fulfillment is prevented by the act of God, as where one has agreed to teach another drawing and he loses his sight, so that he cannot teach it; when the promisee prevents the promisor from doing what he agreed to do; when the promisor has been discharged from his promise by the promisee, when the promise, has been made without a sufficient consideration; and, perhaps, in some other cases, the duties of the promisor are at an end.

References in periodicals archive ?
promisee, or even to the promisor, whether a donative promise that
other things, shields promisors that conduct multistate business from
contrast, the duties of contractual promisors never run to decedent
for goods or services that the promisor does not deliver, restitution
then the Hadley rule falters--it induces promisors to take precautions
can predict that many promisors going into the transaction will expect
It may seem a little odd to think of promisees forcing promisors to
The benefit from shifting incentives from evidence management to performance may, however, be offset somewhat by a factor we have largely excluded from our analysis: Under standards, promisors may invest in predicting how a future court will interpret their vague obligation.
If the remedy is less than expectation damages and performance is efficient, the promisee will bribe the promisor to perform.
When damages are draconian (a la specific performance), promisors will buy their way out of their duties to perform.
One explanation offered by advocates of the current system of remedy is that damages are fully compensatory, and a specific-performance rule might give opportunities for promisees to exploit promisors without actually furthering the goal of compensation.
The promisee's weakened bargaining position arises not only because the promisor will know that, in the event of breach, he will have to pay higher damages, but also, and more importantly, because he will learn the true value of performance to the promisee.