In a former life I worked with a large procure-to-pay ERP system, and we were even stricter. Vendors had to be pre-approved and their bank details managed, who

In a former life I worked with a large procure-to-pay ERP system, and we were even stricter. Vendors had to be pre-approved and their bank details managed, who were explicitly matched to POs, explicitly matched to invoices, and finally... invoices had to be matched to inventory receipts before any sort of payment was triggered. POs had to be approved by someone internally with specific approval levels as well. Not sure if we were insanely overboard but... no idea how this happened.