Under Illinois law, can a joint account have an authorized signer, or is a power of attorney document required in order to allow a non-owner to transact on the account? Can a joint account have more than one authorized signer?

We are not aware of any Illinois law prohibiting joint accounts from having one or more authorized signers. In addition, we are not aware of any requirement for a joint account owner to execute a power of attorney in order to allow a non-owner to transact on the account as an authorized signer.