The customer's authorization document for specific work, with a number your invoice must reference. Many AP systems auto-reject invoices without a valid PO.
Why it matters before the job moves
Working without a PO number in hand means billing on hope. Confirm it before dispatch — it's a readiness check like any other.
Stop getting turned around at the gate.RollReady by SYNNR keeps every piece of iron on one list, with its serial, where it is, and when its next test is due, and warns you before anything lapses.