Learn how to write a formal letter in English with the correct format , structure and tone. See examples of different types of formal letters for various purposes, such as sick leave, resignation, job offer, complaint and appointment. The article elaborates on the format of writing a formal letter , the definition and structure of a formal letter , along with sample formal letters for your reference. Learn how to write a formal letter with this step-by-step guide. Get the correct formal letter format with examples and tips to make the writing process easier. Learn how to structure, format , and proofread your formal letters for professional purposes. See examples, templates, and abbreviations for different types of letters.