What is the buyer's option if the sale involved partial ownership by the seller and the buyer knew this fact?

Chapter on Selling the Musarrah (Animal with milk retained in udder)

Al-Mughni

Book of Sales

Book 12 · Issue 7 · Bab 5

Open in Qurani

Primary text

If the ruling on partial sale transaction is upheld as valid, and the buyer was aware of the situation (entered upon clear insight), the buyer has no option to rescind the contract.