Land Purchaser's Claim for Annulment Based on Unilateral Mistake Regarding Easement Fails

A party, contracted to purchase land, sought annulment of the sale agreement alleging a unilateral mistake regarding the land's legal constraints, specifically citing an easement burdening the property that was not disclosed in the deed. The court rejected the claim, reasoning that a unilateral mistake, even if substantial, does not invalidate a contract unless it concerns an essential quality of the performance or the object of the contract itself, and that the existence of an easement, which is a charge on the property, does not equate to a fundamental error regarding the thing sold as described in the title.