When did you last fund a deal with them? Especially if its been a while could be they want to re-verify or ISO policy/agreement may have changed requiring an update. Actually makes perfect sense to wait until a deal is in final as why bother for an ISO which doesnt produce and possibly suspected of just sending files to fish for information. Not saying you are, but established direct lenders have gazillions of ISOs and having funded a couple of deals with them probably puts you on the low end of the totem pole.