Let's say you have a friend who is highly qualified for a job that your banker has available. You may want to help your friend by recommending him to your banker, but you don't have any idea how to proceed. You head for the library and ask the librarian, "Can you give me a sample letter of introduction?" You immediately have your answer. You discover that your letter should introduce your friend
. by giving his name and a brief explanation of how you know each other and for what length of time. You can also attach your friend's resume. You can find more information here: http://jobsearch.about.com/od/networking/a/introletter.htm