Error of a contracting party

• One party (not the other) errs about the content of the contract (business error)

• One party (not the other) errs when making a declaration of intent (error in declaration)

Error was decisive (causal) for the conclusion of the contract

Balancing the interests of the mistaken party and the contractual partner

• Have steps toward fulfillment already been taken?

• Did the other party (unintentionally) cause the mistake?

• Should the mistake have been noticed by the other party?