The relationship between a bank and its customers can be general or special. Generally, it is that of debtor-creditor, with the bank as trustee and custodian of customers' assets. The general relationship also makes the bank an agent and bailor of customers' goods. Specifically, banks have obligations to maintain secrecy of accounts, honor checks drawn by customers, pay bills as instructed, provide proper services, and submit account statements periodically. Banks have corresponding rights like lien over customers' assets, set-off of accounts, appropriation of payments, and charging interest. The relationship ends upon death or insolvency of a customer, voluntary account closure, or completion of the specific transaction or contract.