A legal notice is a formal communication to a person or entity informing him that you intend to undertake legal proceedings against him. It is a step taken before filing a suit, and is meant to warn the other party that legal action may be taken against him/her, if he/she fails to comply with some specified condition. For example, a legal notice served upon a tenant by a landlord for non-payment of rent usually states that if the tenant fails to pay the outstanding amount by a specified date, the landlord will take legal action against him.