Illinois law generally prohibits you from recording phone calls with customers unless you meet the conditions required under one of the exemptions to that rule. 720 ILCS 5/14-2. There is an exception for use of a telephone monitoring device to record a conversation related to the solicitation, administration, or collection of a bank account, provided that you obtain the other party’s consent to be recorded. 720 ILCS 5/14-3(j).