Before sending a payment, you must first request the 'Send Payment' service.
You may do so by going to your Settings page, and then navigating to Payment Types - ACH.
Now from the ACH Settings Page select the Send ACH Tab.
From there, you will need to upload a voided check for the account you'd like the payments to go out from and fill in all the required information.
Once you have successfully entered all the required information, select the Request Send Payment Service button at the bottom of the section (shown below highlighted in red) and our tech department will be notified of your request, you will then receive a follow up email on approval.