Issue 1040: Transactions are void in some cases as follows:

1- To trade original impurities (Najis-ul-Ayn) such as urine and stool or intoxicant, unless it is for a legal purpose.

2- To trade a usurped property, unless the owner consents to it;

3- To trade the things which are not accounted as one’s property;

4-To trade things such as gambling tools which are usually and commonly utilized for illegal purposes

5- To conduct a transaction which involves usury; it is also illegal to make a transaction which involves fraud and adulteration, that is, to sell something which is made less pure by adding another substance to it, when the latter is not distinguishable and the seller avoids telling the buyer about it; for example, to sell some oil which has been mixed with sheep tallow. In this regard, there is a quote from the Holy prophet (PBUT) which says, “one, who deceives Muslim by making transactions involving adulteration, or who puts them to a loss is not accounted as my follower and if one commits adulteration in the course of a transaction with their brethren, Allah will deprive them of the Blessings in their livelihood, block the way in which they make living, and will leave them on their own.”

Issue 1041: Trading blood for legal purposes is permissible; for instance, to sell one’s blood to be used for patients and injureds is legal but to trade blood for the purpose of drinking is illegal.

Issue 1042: It is permissible to use medical instruments to transfuse one’s blood into the body of someone else, but it should be weighed and the receiver should pay the giver for that, unless they should make a compromise.

Issue 1043: It is permissible to trade oils, liquid medications, and perfumes which are imported from non-Islamic countries if it is not certain whether they are pure or not; but as for the oil which is obtained from slaughtered animals, if acquired from an infidel in their town and if it belongs to an animal whose blood gushes out when its jugular vein is slit, it will be pure but illegal to eat and void to trade due to its being not slaughtered according to the Islamic laws, unless it is used for a legal purpose; such oil will be pure and legal if it is acquired in Muslim’s towns or countries and if it is certain that it has been acquired from a Muslim.

Issue 1044: It is permissible to trade the meat and tallow acquired from a Muslim, but if one is certain that the Muslim him/herself has acquired it from a non-Muslim without investigating whether or not the animal has been slaughtered according to the laws, It will be illegal to trade it and the transaction will be void, unless it is for any legal purpose other than eating.

Issue 1045: It is illegal to trade intoxicants and the transaction will be void.

Issue 1046: It is void to trade usurped property and the seller must return the money to the buyer.

Issue 1047: If something which can be used for legal purposes is sold to be used for an illegal purpose, for instance, if grapes are sold to be used for producing wine, the transaction will be illegal and void.

Issue 1048: It is illegal to purchase something which has been obtained through gambling, theft, or a legally invalid transaction and one must avoid taking possession of such a thing, and if anyone buys such property, they must return it to its original owner.

Q1049: Regarding the issue that wearing gold ornaments is illegal for men, what will the case of making and selling men’s gold ornaments be?

A: It is illegal to sell men’s ornaments which are commonly and illegally used by men, and such a transaction will be void; however, if it is common in a society to give gold ornaments to men to be kept as souvenirs, or if the buyer is a particular person whose purpose we know is to buy the gold for a man as a souvenir, it will be permissible to trade men’s gold ornaments.

Q1050: Is it permissible to sell illegal fish or any other illegal animal than the originally impure ones to those who do not care about legality or illegality of these, or to non-Muslims for their consumption?

A: It is permissible.