Under Dutch law (article 6:228 of the Dutch Civil Code), a contract which has been entered into under the influence of an error and which would not have been entered into had there been a correct assessment of the facts may be voidable.
Mistake may result from:
Under certain circumstances, a party may have a duty to provide relevant information, which overrides the obligation of the mistaken party to investigate the facts of its own accord.
Under Dutch law the mistaken party will be prevented from rescinding the contract if it bears the risk of the mistake on account of the nature of the contract, social standards or the circumstances of the case.
Additionally, a contract may not be avoided on grounds of a misconception relating to future events.
If you think that you may have entered into a contract in reliance on a mistaken understanding regarding a key issue, the contract might be voidable.