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80 Cards in this Set

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what kinds of circumstances can you not rely on the doctrine of mistake on

correcting horrible business decisions when viewed in hindsight

what qualifies for the application of the doctrine of mistake

where parties to a contract individually or collectively make a fundamental, vital, essential mistake about a significant element of their contract or the possibility of its performance

why are courts extremely unwilling to allow claims of mistake to succeed

a successful claim renders a contract void

what case says that if money has been promised but not paid it ceases to be payable

Couturier v Hastie

what case says that a successful claim of mistake can mean a contract is treated as if it never happened

Bank of Hindustan, China and Japan, ex p Alison

what case says that a successful claim of mistake can mean a contract is treated as if it never happened

Bank of Hindustan, China and Japan, ex p Alison

what happened in Re Bank of Hindustan, China and Japan, ex p Alison

held that if money had been paid in pursuance of the supposed contract, it is recoverable as money paid for a consideration that has totally failed

what case says that a successful claim of mistake can mean a contract is treated as if it never happened

Bank of Hindustan, China and Japan, ex p Alison

what happened in Re Bank of Hindustan, China and Japan, ex p Alison

held that if money had been paid in pursuance of the supposed contract, it is recoverable as money paid for a consideration that has totally failed

what are the types of mistakes

common mistake


mutual mistake


unilateral mistake

what is a common mistake

where both parties make a fundamental mistake about a vital, essential aspect of a contract.

what is a mutual mistake

where parties are at cross-purposes and make different but fundamental mistakes about an essential, vital aspect of a contract

when will the court allow a common mistake claim

when the fundamental mistake renders a contract in effect impossible to be performed and none of the contractual parties are at fault for causing the mistake

what is a mutual mistake

where parties are at cross-purposes and make different but fundamental mistakes about an essential, vital aspect of a contract

when will the court allow a common mistake claim

when the fundamental mistake renders a contract in effect impossible to be performed and none of the contractual parties are at fault for causing the mistake

how must the ambiguity be for mutual mistake

fundamental and render a contract in effect impossible to be performed

what is a mutual mistake

where parties are at cross-purposes and make different but fundamental mistakes about an essential, vital aspect of a contract

when will the court allow a common mistake claim

when the fundamental mistake renders a contract in effect impossible to be performed and none of the contractual parties are at fault for causing the mistake

how must the ambiguity be for mutual mistake

fundamental and render a contract in effect impossible to be performed

what is a unilateral mistake

where one party to a contract makes a fundamental mistake concerning an essential and vital aspect of a contract. The other contractual party is aware of this mistake before a contract is concluded

what is a mutual mistake

where parties are at cross-purposes and make different but fundamental mistakes about an essential, vital aspect of a contract

when will the court allow a common mistake claim

when the fundamental mistake renders a contract in effect impossible to be performed and none of the contractual parties are at fault for causing the mistake

how must the ambiguity be for mutual mistake

fundamental and render a contract in effect impossible to be performed

what is a unilateral mistake

where one party to a contract makes a fundamental mistake concerning an essential and vital aspect of a contract. The other contractual party is aware of this mistake before a contract is concluded

generally where does mistake only apply

where the express and implied terms of contract, and representations and warranties made by contractual parties do not cover or clarify who should bare the risk of a mistake occurring.

when does common mistake occur

where parties to a contract are unaware that they have made a fundamental mistake about an essential element of a contract

when does common mistake occur

where parties to a contract are unaware that they have made a fundamental mistake about an essential element of a contract

what happens if a party knows about the mistake before the contract is concluded

then it cannot be a common mistake

when does common mistake occur

where parties to a contract are unaware that they have made a fundamental mistake about an essential element of a contract

what happens if a party knows about the mistake before the contract is concluded

then it cannot be a common mistake

how must parties enter into a contract for it to be a common mistake

they must enter into a contract under a common, false assumption that the contract does not have a fundamental, vital, essential flaw that makes the contract, in effect, impossible to perform

what case established the legal test for a claim of common mistake to be successful

Bell v Lever Bros

what was held in Bell v Lever Bros

a very high threshold for a mistake to be operative only where the mistake is so essential, so vital, so material or fundamental to the contract or its performance that it changes completely what the parties imagined the contract to be

How did Great Peace Shipping v Tsavliris clarify the common mistake test

must make the performance of the contract impossible and there are 4 elements that have to be met

How did Great Peace Shipping v Tsavliris clarify the common mistake test

must make the performance of the contract impossible and there are 4 elements that have to be met

what are the four elements established under Great Peace Shipping v Tsavliris

1 common assumption as to the existence of state affairs


2 no warranty by either party that that state of affairs exists


3 non-existence of the state affairs must not be attributable to the fault of either party


4 non existence of the state of affairs must render the performance of the contract impossible

what is Res Extincta

where the subject matter of a contract does not exist but is erroneously assumed to exist as an essential requirement for the performance of a contract

what case is an example of the subject matter of a case failing to exist

Couturier v Hastie

what case is an example of the subject matter of a case failing to exist

Couturier v Hastie

what case is an example of a common mistake about the ownership or title of the subject matter of a contract

Cooper v Phibbs


man tries to lease land he already owns

when does mutual mistake occur

where contractual parties are at cross-purposes about what they are agreeing to

when does mutual mistake occur

where contractual parties are at cross-purposes about what they are agreeing to

how does mutual mistake differ from common mistake

in mutual mistake parties dont make common erroneous assumptions they make different erroneous assumptions about the same thing

what was said in Raffles v Wichelhaus which is representative of mutual mistake

court held the parties were at cross-purposes and there was no consensus ad idem (meeting of minds)

what case says for mutual mistake that the mistake may be one of omission in which a word or whole term was left out of an agreement

Joscelyne v Nissen

what case says for mutual mistake that the mistake may be one of omission in which a word or whole term was left out of an agreement

Joscelyne v Nissen

what case says that for mutual mistake the mistake may be one of erroneous inclusion

Craddock Bros v Hunt

what case says for mutual mistake that the mistake may be one of omission in which a word or whole term was left out of an agreement

Joscelyne v Nissen

what case says that for mutual mistake the mistake may be one of erroneous inclusion

Craddock Bros v Hunt

what case says for mutual mistake the mistake may be one of inaccuracy where for example the wrong period of time has been stated for performance

Roberts & Co Ltd v Leicestershire County Council

what case says that for mutual mistake the mistake may be about the meaning of words intentionally used in the document

Re Butlin’s Settlement Trusts

what case says that for mutual mistake a mistake about the significance of words, as where parties use words to express their agreement but words that are ambiguous can be rectified to achieve the necessary precision

London Weekend Television Ltd v Paris

what case says that for mutual mistake a mistake about the significance of words, as where parties use words to express their agreement but words that are ambiguous can be rectified to achieve the necessary precision

London Weekend Television Ltd v Paris

whats the difference between unilateral mistake and the other forms of mistake

one of the contractual parties is aware that the parties are entering into a contract on the basis of a vital and essential mistake or erroneous assumption

whats the difference between unilateral mistake and the other forms of mistake

one of the contractual parties is aware that the parties are entering into a contract on the basis of a vital and essential mistake or erroneous assumption

how might one party be actively involved in inducing the other party to enter into a contract on the basis of mistake

through fraud/ misrepresentation

whats the difference between unilateral mistake and the other forms of mistake

one of the contractual parties is aware that the parties are entering into a contract on the basis of a vital and essential mistake or erroneous assumption

how might one party be actively involved in inducing the other party to enter into a contract on the basis of mistake

through fraud/ misrepresentation

why would a claimant rely on unilateral mistake instead of misrepresentation when facts allow for both

depends on the type of remedy/ relied they’re seeking typically where they are induced to enter a contract because of fraud and third parties are involved

whats the difference between unilateral mistake and the other forms of mistake

one of the contractual parties is aware that the parties are entering into a contract on the basis of a vital and essential mistake or erroneous assumption

how might one party be actively involved in inducing the other party to enter into a contract on the basis of mistake

through fraud/ misrepresentation

why would a claimant rely on unilateral mistake instead of misrepresentation when facts allow for both

depends on the type of remedy/ relied they’re seeking typically where they are induced to enter a contract because of fraud and third parties are involved

what did Lord Denning in Lewis v Averay argue

an inno purchaser who knew nothing of what passed was rogue should have his/her title depend on the mistake of others

what did Lord Denning in Lewis v Averay argue

an inno purchaser who knew nothing of what passed was rogue should have his/her title depend on the mistake of others

in lieu of fraud who do the courts tend to prioritize the rights of

third parties where they act in good faith

what did Lord Denning in Lewis v Averay argue

an inno purchaser who knew nothing of what passed was rogue should have his/her title depend on the mistake of others

in lieu of fraud who do the courts tend to prioritize the rights of

third parties where they act in good faith

how do courts prioritize the rights of the innocent third party

by presuming that we intend to deal with the person infront of us even if they turn out to be someone else

what did Lord Denning in Lewis v Averay argue

an inno purchaser who knew nothing of what passed was rogue should have his/her title depend on the mistake of others

in lieu of fraud who do the courts tend to prioritize the rights of

third parties where they act in good faith

how do courts prioritize the rights of the innocent third party

by presuming that we intend to deal with the person infront of us even if they turn out to be someone else

what case said that the common law holds that the fruadsters physical presence identified by sight and hearing preponderates over vagaries on nomenclature

Ingram v Little

what did Lord Denning in Lewis v Averay argue

an inno purchaser who knew nothing of what passed was rogue should have his/her title depend on the mistake of others

in lieu of fraud who do the courts tend to prioritize the rights of

third parties where they act in good faith

how do courts prioritize the rights of the innocent third party

by presuming that we intend to deal with the person infront of us even if they turn out to be someone else

what case said that the common law holds that the fruadsters physical presence identified by sight and hearing preponderates over vagaries on nomenclature

Ingram v Little

for the presumption that we intend to deal with the person infront of us to be challenged what needs to be shown by the claimant

the personal identity of the person they entered into a contract with was an essential, vital, prerequisite

is it enough to show that the vlaimant wasnt just concerned about this person having certain attributed like the means to pay/ being creditworthy

no, have to show that it was paramount that it was that specific individual

whats an example of a case where the contract wasnt considered void under unilateral mistake concerning identity because personal identity wasnt the vital characteristic but it was creditworthiness that was vital

Phillips v Brooks

what happens if the inno party doesnt deal with the fraudster face to face and fraudster sells the product on to an inno third party who purchased in good faith

Finance v Hudson


the claim of unilateral mistake was successful because the lending company wasnt dealing with the fraudster face to face but through documents