How To Write A Informal Letter In English Pdf . Johnson is the wife of mr. Personal letters may be short or long but they are usually chatty and informal. How to Write Informal Letters in English (with Examples) ESL Buzz from www.eslbuzz.com There is no one way to sign off informal letters. It’s great to hear that… i’m sorry to hear that… i’m really sorry to read your news. I want to buy a new one.