What does it mean that banks need to provide proof of joint and several debts?

Whether it meets the negotiation conditions of the bank. Banks are legally established financial institutions engaged in monetary and credit business, and are the product of the development of commodity monetary economy to a certain stage. Banks need to provide proof of joint and several debts that meet the negotiation conditions of banks. Banks are one of the financial institutions. Banks are divided into central banks, policy banks, commercial banks, franchised institutions, investment banks and the World Bank, with different responsibilities.