625 ILCS 5/3-612
The Secretary, upon receipt of an application, made on the form prescribed by the Secretary of State may issue to financial institutions, to lending institutions and to persons engaged in the business of repossessing motor vehicles for others in situations where the motor vehicle is the security for the funds, special plates which may be used by such financial institutions, lending institutions and repossessors solely for the purpose of operating the motor vehicles which are repossessed by such repossessors upon a default in the contract.
Said special plates shall, in addition to the legends provided in Section 3-412 of this Act, contain a phrase "repossessor" and such other letters or numbers as the Secretary of State may prescribe. If an applicant for such plates is engaged in repossessing vehicles for other persons and does not hold a certificate, registration or permit from the Illinois Commerce Commission to conduct such an operation, the application shall be denied.
625 ILCS 5/3-612