A company of significant size will always have cracks that can be fallen through, and accounting and payment systems are often so automatic that no central auth

A company of significant size will always have cracks that can be fallen through, and accounting and payment systems are often so automatic that no central authority will ever notice unless it’s brought to their attention. Such places usually assume middle management’s responsibility is to flag cases that need attention, but if things shake out such that a person winds up disconnected from the broader org tree like in this case it’s entirely possible that nobody notices for months or years.