Electronic Interface cheque outsourcing

We are currently using the electronic interface module in AP for our ACH payments and we would like to implement cheque outsourcing also using EI. However we have run into a small snag where EI requires all vendors to have banking information set up, for cheques obviously we don’t have this. Am I missing something and is there a way to use EI and create payments to vendors without banking information, or do we need to fill in dummy data to get around this?