Payment problems often start in documentation, acceptance, certification and approval long before an invoice becomes overdue.
Delay often begins before ageing
An invoice can be headed toward delay while still shown as current: it may not be acknowledged, may lack a GRN or certificate, may be in a query queue, may reference the wrong PO or may not have reached the correct approver.
Day-zero assurance
Risk appetite determines intervention
A company may appoint GGA from Day 0 for government/complex accounts, at due date for higher-risk buyers, or after contractual credit plus a defined grace period for stable accounts. The point is deliberate policy rather than accidental delay.
The outcome
Revenue Assurance does not eliminate every late payment. It reduces avoidable friction and creates earlier evidence about which accounts require active realization or recovery.