The concept of Multiple Invoices For One PO is a business process that allows for multiple invoices to be generated against a single purchase order (PO). This enables businesses to have greater flexibility and control when it comes to managing their finances. By allowing for multiple invoices to be generated off a singular PO, business owners can better track the various stages of their orders and ensure accuracy when filing their taxes and reconciling their accounts. Furthermore, this process provides an added layer of accountability in terms of ensuring proper payment for products and services rendered.