Key legal question
Whether the property-transfer contract could be invalidated for essential error because the buyer had not foreseen the withholding tax burden.
Extracted holding
No. The alleged mistake concerned only a contractual tax effect outside the parties' reciprocal agreement and was therefore not an essential error.
Extracted reasoning
The parties agreed only on transfer of the coproperty share and reimbursement of liquidation taxes announced in advance. The withholding tax did not burden the company as liquidation tax; it burdened the buyer as a personal tax consequence of the benefit received. An error about such a downstream effect is not essential under Art. 24(1) no. 4 CO.