وإن اطلع على خيانة في التولية أسقطها المشتري من الثمن
Translation: If dishonesty is discovered in tawliyah, the buyer deducts the dishonest excess from the price.
Tawliyah is a transfer at the genuine first price. If an inflated amount remained payable, it would no longer be a true tawliyah transaction. Abu Hanifah therefore removes the dishonest increment.
Example: goods bought for Rs 900 were sold as tawliyah at a claimed first price of Rs 1,000. Once the fact is established, Rs 100 is deducted, leaving Rs 900.