Peppol invoice response (IMR)

The Peppol invoice response tells the supplier, machine-to-machine, what happened to their invoice on the buyer side — received, under review, approved, rejected with reasons, or paid. It replaces "did you get my invoice?" phone calls with status data.

Business statuses include acceptance, rejection (with structured reason codes — wrong reference, price mismatch), conditional acceptance and payment notification. For suppliers this is cash-flow telemetry; for buyers it cuts supplier-inquiry load. Not to be confused with the transport-level MLR, which only confirms the message was technically processable.

Updated: August 29, 2026