An Illinois Letter To Sheriff is a formal document sent by a private individual or legal entity, such as a corporation, to a county sheriff in the state of Illinois. This type of letter is used to request the sheriff to perform a specific action. There are two types of Illinois Letters To Sheriff: an Illinois Sheriff's Letter of Appointment and an Illinois Sheriff's Letter of Authority. The Letter of Appointment is used to request the appointment of a sheriff to take action on behalf of the sender. The Letter of Authority is used to request the sheriff to take action on behalf of the sender. Both letters must include the name of the sender, the name of the sheriff, the specific action requested, and an authorization signature.