II. Business and personal letters formal and informal distinctions A)Format distinctions Personal/Informal letter is a form of letter written to a close friend, relative or an acquaintance Informal letter doesn't follow a strict rigid form or structure. It has a sentimentality which transcends all forms of communication Importance of details like the complete date or the address depends on the persons relation with the other personIII. Business and personal letters: formal and informal distinctions A) Format distinctions Personal/Informal letter is a form of letter written to a close friend, relative or an acquaintance. Informal letter doesn’t follow a strict rigid form or structure. It has a sentimentality which transcends all forms of communication. Importance of details like the complete date or the address depends on the person’s relation with the other person