the check is in the mail

The check is in the mail is a catch phrase which is often used by people or organizations to appease their creditors so that they will stop being harassed. This has become a cliche because of how often it is used in order to get creditors off their back. Typically individuals who owe money to creditors, will respond to their request for payment by saying the check is in the mail as a way to convince them they will pay them soon; whether this is true or not.