Client deposited funds into Firm's trust account for a specific transaction. The transaction never closed. More than five years later, Client and subsidiaries were involuntarily dissolved by Illinois Secretary of State. Firm may properly transfer the funds to its operating account in satisfaction of its claim for attorney fees if it has obtained written consent from the dissolved Client, through one of its former officers. Absent consent, Firm should reduce its claim to judgment and thereafter obtain a court order to set off its judgment lien against the funds held in the trust account.