Major differences between formal communication and informal communication are as follows:
1. Type
Formal Communication: It is written type of communication.
Informal Communication: Informal communication is verbal or oral type of communication.
2. Chain Of Command
Formal Communication: It follows a chain of command.
Informal Communication: It does not follow chain of command and move in any direction.
3. Proof
Formal Communication: Proof or supporting documents are kept safely in formal communication.
Informal Communication: There is no proof or supporting document in informal communication.
4. Security
Formal Communication: High level of security is maintained in formal communication.
Informal Communication: There is a lack of security in informal communication.
Formal Communication: Messages and information are authentic in formal communication.
Informal Communication: Messages, information and opinions may not be authentic in informal communication.
6. Time
Formal Communication: Formal communication takes more time than informal communication.
Informal Communication: It is faster than formal communication.
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7. Examples
Formal Communication: Orders, reports, requests etc.
Informal Communication: Discussion, gossips etc.