Transfer of ownership means the transfer of property rights in goods from the seller to the buyer, which constitutes ownership for the buyer. A contract of sale involves the transfer of ownership or property rights in the goods, which is the main objective. There are two types of goods - ascertained goods, which are specifically identified in the contract, and unascertained goods, which are not specifically identified at the time of contract. For ascertained goods, ownership passes at the time intended by the parties. For unascertained goods, they must be identified and unconditionally set aside for the buyer or seller with consent of the other party for ownership to pass. The rules for when ownership passes depends on whether the goods are in