This Is a Certified Answer

Certified answers contain reliable, trustworthy information vouched for by a hand-picked team of experts. Brainly has millions of high quality answers, all of them carefully moderated by our most trusted community members, but certified answers are the finest of the finest.
To write an informal letter, it must contain the necessary information such as:
1. Your complete address along with the zip code
2. The name of the person your writing to, his position, and the company he's working with, and the complete address of the company
3. Salutations
4. In the body of your letter, it must state your purpose for writing and your contact information
5. Finally, as a closing, you must write your name at the bottom.