How to write a formal letter?

English as a Second Language English Vocabulary, Grammar and Idioms
1

Dear friends,

I want to learn how to write formal letter such as request or appeal. plea give me guidelines.

Thanking You
Amila

2

Hi Amila,

Welcome to the forums!

Guide to basic business letter

If you write one, then feel free to post it here. Someone will be willing to check it over for you.