2145. If a seller informs the buyer about the cost price of a commodity, he should tell him about all factors which would affect the rise or fall in the price of the commodity, even if he may sell it at the same price (i.e. at the cost price) or at price less than that. For example, he should tell the buyer whether he has purchased the property against cash payment or on credit. In addition, if he does not give some of the particulars of the commodity, and later it becomes advent to the buyer, he can cancel the transaction.
2146. If a person gives a commodity to another person, and fixes its price and says, "Sell this commodity at this price, and the more you sell, will be your commission." If he sells the commodity for higher price, the excess of the money realized will be that of the owner, and he will be entitled to the commission from the owner. However, if the arrangement is by way of granting a reward, it is in order. In addition, whatever excess he received, it is his property not of the owner. Similarly, if the owner says, “I have sold this commodity to you on this price” and he answer, “I accept”. Alternatively, if the owner gives him the commodity with the intention of selling and he as well receives with the intention of purchasing it, on whatever higher price he sells the commodity, it is his own property.
2147. If a butcher sells the meat of a male animal and in place of that provides with the meat of a female animal, he has committed a sin. Hence, if he specifies the meat saying: I am selling the meat of a male animal", the buyer can cancel the transaction. In addition, in case, he does not specify it, the butcher must supply the meat of a male animal, if the buyer is not willing to accept the meat, which has been given to him.
2148. If a buyer tells the draper that he wants a cloth whose color does not fades and the draper sells him a cloth whose color fades, the buyer can cancel the transaction.
2149. To swear in the matter of transaction is Makrooh even if it is true, and Haraam, if it is false.