How to prepare a introductary letter of a share broking firm

If you put the two words, "Introduction Letter" with the quotes, into the search function at the top of this page, you will find many links to questions that have been about introduction letters of some kind. You might find some helpful information on some of the answers.

Are you trying to introduce a new business? No matter what kind of introduction letter, it is best that it be personalized some how to the firm or person to whom it is addressed. Like, using people's formal names rather than "Dear Sir" or "To Whom It May Concern."

Just some initial thoughts for you... I do wish you well!