Mortgage registration department. According to the inquiry of China Industrial and Commercial Bank official website, you need to bring your valid ID card, loan settlement certificate and relevant documents issued by the handling bank to the original mortgage registration department for mortgage registration cancellation. Established in 1984, China Industrial and Commercial Bank is one of the top five banks in China and one of the top 500 enterprises in the world, with the largest customer base in China and the largest commercial bank in China.