Act as Payment Agents Banks also serve often under-appreciated roles as payment agents within a country and between nations. Not only do banks issue debit cards that allow account holders to pay for goods with the swipe of a card, they can also arrange wire transfers with other institutions. Banks essentially underwrite financial transactions by lending their reputation and credibility to the transaction; a check is basically just a promissory note between two people, but without a bank's name and information on that note, no merchant would accept it. As payment agents, banks make commercial transactions much more convenient; it is not necessary to carry around large amounts of physical currency when merchants will accept the checks, debit cards or credit cards that banks provide. Provide Safety Banks also provide security and convenience to their customers. Part of the original purpose of banks, and the goldsmiths that predated them, was to offer customers safe keepin...