When writing a letter think about the purpose - why are you sending this letter
Don't forget that the business writing should be clear and concise
Avoid any language that your audience may not understand
Which of these letters have you met in your every-day work?
How do we call these letters in Estonian? Find the proper name for each letter.
After that go on and get to know more about
cover letters
application letters
complaint letters
inquiry letters
With every different type you will find also some examples.