215 ILCS 5/390
Whenever a bond, undertaking, recognizance, guaranty or other obligation is required, permitted, authorized or allowed; or whenever the performance of any act, duty or obligation, or forbearance, is required, permitted, authorized or allowed to be secured or guaranteed, such bond, undertaking, recognizance or other obligation, or such security or guaranty, may be executed by a company authorized in this State to do the kinds of business described in clause (g) of Class 2 of section 4; and such companies are authorized and empowered to execute all such instruments; and in case two or more of such companies execute any such instrument each of such companies is hereby authorized and empowered to limit its liability therein to an amount less than the aggregate penalty of such instrument and also to limit its liability to a pro rata part of any and all losses under such instrument; and the execution by any such company of such bond, undertaking, recognizance, guaranty or other obligation by an officer, attorney-in-fact or other authorized representative shall be sufficient and be accepted as and be a full compliance with every law or other requirement now in force or that may hereafter be enacted or made that such bond, undertaking, recognizance, guaranty or like obligation be required or permitted or be executed by a surety or sureties, or that such surety or sureties be residents, householders or owners or life tenants of real estate, or possess any other qualifications.
215 ILCS 5/390