The document discusses the various types of relationships that can exist between a banker and a customer. There are transactional relationships where the bank provides products and services to customers. Additionally, relationships include creditor-debtor where the depositor lends money to the bank; beneficiary-trustee when valuables or money are kept for safekeeping; principal-agent for ancillary services; and lessee-lessor for safe deposit lockers. Maintaining trust is important for building healthy banker-customer relationships.