Kui tahteavalduse saaja tahteavalduse tegija tegelikku tahet ei teadnud ega pidanudki teadma, tuleb tahteavaldust tõlgendada nii, nagu tahteavalduse saajaga sarnane mõistlik isik seda samadel asjaoludel mõistma pidi.
A party may only avoid the contract for mistake if, when the contract was concluded, the mistake was of such importance that a reasonable person in the same situation as the party in error would only have concluded the contract on materially different terms ...