If a purchaser was unaware that the slave was subject to a kitāba, he may either rescind the sale or accept a price reduction (arsh).

He stands in the same position as the seller: once the mukatab pays what he owes, he is emancipated and the purchaser1 receives the right of walāʾ (successional allegiance).

It is permissible to place a mukatab in waqf; however, once he completes the payment the waqf is nullified2.

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The kitāba is a binding contract on both parties: no option of withdrawal may be inserted, and it is not dissolved by the master’s death, insanity, or legal interdiction.

The slave is freed when the payment is delivered to whoever lawfully represents the master.

If3 an installment falls due and the mukatab fails to pay, the master may revoke the contract4, but he must first grant a three-day grace period—either for the sale of movable goods or for money that is absent yet lies within less than the travel distance that allows shortening the prayer, and whose arrival is reasonably expected.

The master is obligated to advance to the mukatab one quarter of the kitāba price.

If the master is unable to supply that quarter, he may annul the contract.

The mukatab, even if capable of earning, may declare himself incapable.

Finally, the kitāba may be terminated by mutual agreement of the two parties.