Yes an agreement is in order. Ours is a modified version of the one we give to business originators. To reduce risk, our system generates prenotes automatically for these external ACH transfers and the customer cannot originate an item for 6 business days to allow time for the prenotes to be returned. To further lessen our risk, on debit originations the customer's account at our bank is credited 3 business days after the debit is sent, to allow time for an item to be returned NSF, acct. closed, etc. This puts the debit risk on the customer instead of us. We have several hundred customers on the system and it works pretty well. The lag between debit settlement and credit settlement initially created some headaches for our accounting folks but they worked thru the issues.