Article 456 of Civil Code

1 - The buyer must have sufficient knowledge of the thing sold; otherwise, he has the right to request annulment of the sale. 2 - The inclusion in the contract of a statement of its essential characteristics that enables it to be identified constitutes sufficient knowledge of the thing sold. - If the contract states that the buyer knows the thing sold, he may not request annulment of the sale on the ground of lack of knowledge of it unless he proves fraud by the seller. 4 - If the buyer takes delivery of the thing sold and does not object to it within a reasonable period, that shall constitute acceptance of it. 2 - Sale by Sample