Invoice Reference Number (IRN) in FBR Digital Invoicing
Every invoice posted to FBR gets a unique Invoice Reference Number (IRN). Here is what the IRN is, how it is generated, how buyers use it to track and verify an invoice, how it differs from the QR code, and why it matters.
What the IRN is
When an invoice is submitted and accepted by FBR's Digital Invoicing system, FBR returns a unique Invoice Reference Number — often called the IRN or FBR invoice number — that identifies that exact invoice in FBR's records.
It is assigned by FBR at the moment of posting, so it cannot be made up or reused.
IRN vs the QR code
The IRN and the Version 2.0 QR code work together but are not the same thing: the IRN is the unique identifier, while the QR code is a scannable representation that links back to FBR's record of the invoice.
A compliant invoice must show both, along with the FBR Digital Invoicing logo.
Why the IRN matters
The IRN is what makes an invoice traceable and verifiable. For registered buyers, it is the reference that ties the invoice to FBR and supports their input-tax position.
For your own records, the IRN is the definitive key for each filed invoice.
How Digi Invoice handles the IRN
Digi Invoice captures the IRN returned by FBR and places it, with the QR code and logo, on every posted invoice and PDF automatically.
You never copy or format it by hand — each compliant invoice carries its correct IRN.