1 Informal Communication is the opposite of formal communication. Usually used when in face to face conversation with a friend or relative- a personally known person. Informal communication is also...
Examples of informal communication would be Instant messaging, a casual disscusion, verbal exchange, note, or memorandum that may adhere less strictly to rules and conventions.
There are many types of informal communications: email, fax, note, personal letter, chat with a friend, water cooler gossip and phone calls, to name just a few.