First of all you should understand the meaning of letter ,for which cause it is written ,then point out important or main cause shown in letter, point out different relating words used in letter and
you should have answer to them. Then make the notice on the basis of these points.
you should have answer to them. Then make the notice on the basis of these points.
I'm afraid no one will be able to answer your question until you can offer a bit more detail. What is the letter supposed to explain, and who is the notice for? If you can write another question, giving more detail about who you are writing to and why, I'm sure someone will be able to help you and probably find a sample letter online for you.