Notify each affected individual whose sensitive customer information was, or is reasonably likely to have been, accessed or used without authorization in accordance with paragraph (a)(4) of this section unless the covered institution determines, after a reasonable investigation of the facts and circumstances of the incident of unauthorized access to or use of sensitive customer information, that the sensitive customer information has not been, and is not reasonably likely to be, used in a manner that would result in substantial harm or inconvenience.