There are various types of letters of intents for instance if you are applying for university or college then you would need to create a letter of intent for graduate school or university. If you are planning to apply for a job then you would need a letter of intent for a particular job position.
Ziad K. Abdelnour, President & CEO Blackhawk Partners, Inc, the New York_based advisory firm on such matters, puts it this way: "Giving a Letter of Intent only means 'Yes I'm intent to buy the goods but I can change my mind anytime.' A letter of Intent is not a binding contract. [Hence] The Letter of Intent is a total waste of time on a worthless piece of paper."