105 ILCS 5/5-35
Liability of trustees for sufficiency of securities taken from township treasurer. Trustees of schools shall be liable, jointly and severally, for the sufficiency of securities taken from township treasurers; and in case of judgment against any treasurer and his sureties for or on account of any default of such treasurer, on which the money is not made for want of sufficient property whereon to levy for the enforcement of a judgment, a civil action may be maintained against the trustees, jointly and severally, and the amount not collected on the judgment shall be recovered with costs of the action from such trustees. If the trustees can show, satisfactorily, that the security taken from the treasurer, was, at the time it was taken, sufficient, they shall not be held liable.
105 ILCS 5/5-35