The duty to inform on a specific feature of an artwork exists only if a seller should assume that this feature might influence the decision of a buyer to conclude a contract or even the conditions under which a contract is concluded.
A homeowner who entrusts home renovations to an architect must clearly indicate if he wants a binding cost limit. Otherwise, the architect will only be liable for exceeding the cost estimate if the estimate was flawed or exceeded more than 10%.
Swiss law provides for a special basis of liability for conduct contrary to the rules of good faith in the context of pre-contractual negotiations. The more unreasonable the position adopted by a negotiating party, the more difficult it is for that party to successfully claim that the other party who broke off the negotiation is liable.