Tamra Patra
4notify India · The Copper-Plate Edicts
EDICT · GSTN · IRP · CBIC
Tamra Patra
TP-IN-004
Date
2026-05-27
Status
In force
Category
Tax and e-invoicing

GST e-invoice (IRN/IRP), GSTIN and e-Way Bill: delivery of Invoice Reference Number acknowledgements to the Indian taxpayer

Every Indian B2B taxpayer above the e-invoice threshold (currently INR 5 crore aggregate turnover) must register the invoice on the Invoice Registration Portal (IRP), which returns an Invoice Reference Number (IRN), a digital signature and a QR code, before the tax invoice is legally valid. The 18% B2B GST and the e-Way Bill flow downstream from that. 4notify integrates with Indian ERPs (Tally, Zoho Books, Marg, Busy, ClearTax) and delivers IRN acknowledgements, validation status and e-Way Bill alerts to the correct CA or accounts contact.

EmailWebhook
Preamble

Whereas, by virtue of the powers vested by the Central Goods and Services Tax Act, 2017 and the Integrated Goods and Services Tax Act, 2017, and in furtherance of the GST e-invoicing scheme administered by GSTN through the Invoice Registration Portal, this edict is issued upon the delivery of IRN acknowledgements and validation reports.

Statutory basis
Central Goods and Services Tax Act, 2017 (CGST Act)

Legal foundation for GST, e-invoicing and the IRP scheme.

CGST Rules, 2017 — Rule 48(4) (e-invoicing)

Mandatory IRN registration for notified taxpayers; threshold currently INR 5 crore.

Notification 17/2022-CT and subsequent notifications

Progressive lowering of the e-invoicing turnover threshold.

Implementation
01

ERP webhook subscription

4notify subscribes to the IRN queue of the ERP (Tally, Zoho Books, Marg, Busy, ClearTax). Validation runs at the API edge before despatch.

02

Acknowledgement and validation report

Issuer acknowledgement within 60 seconds; IRP validation status (accepted / observations / rejected) within 5 minutes.

03

Delivery to the right CA

With the CA's email and ICAI membership number, the acknowledgement is routed to the responsible professional and CC'd to the company's accounts mailbox.

04

Eight-year retention

Each invoice and acknowledgement is hash-signed and retained for eight years, per GST record-keeping rules.

Delivery envelope
xml
<gst-irn-ack xmlns="https://4notify.net/gst-in/v1">
  <irn>a1b2c3d4e5f6a1b2c3d4e5f6a1b2c3d4e5f6a1b2c3d4e5f6a1b2c3d4e5f6</irn>
  <ack_no>112025052712345678</ack_no>
  <ack_dt>2026-05-27T14:32:00+05:30</ack_dt>
  <gstin_supplier>27AAACH1234A1Z1</gstin_supplier>
  <gstin_recipient>29AAACI5678B2Z2</gstin_recipient>
  <invoice_no>INV/2026-27/00481</invoice_no>
  <doc_type>INV</doc_type>
  <validation_status>accepted</validation_status>
  <ca_icai>123456</ca_icai>
</gst-irn-ack>
Sample message
EmailSubject: IRN acknowledgement: invoice INV/2026-27/00481

Dear Taxpayer, Your invoice INV/2026-27/00481 was registered on the IRP on 27-May-2026 14:32. IRN: a1b2c3d4…6 Ack No: 112025052712345678 Validation status: accepted Routed to: CA (ICAI 123456) Regards, 4notify Operations

Compliance checklist
  • ERP / accounting software webhook configured
  • GSTIN format (15 char, state-code prefixed) validated at API edge
  • Acknowledgement P50 ≤ 60 seconds measured
  • Eight-year retention documented per CGST Rules
The 4notify difference

4notify is the only A2P provider with native integration into Indian ERPs (Tally, Zoho Books, Marg, Busy, ClearTax), IRN acknowledgement at the API edge, and eight-year retention conforming to CGST Rules.

Frequently asked questions
Does 4notify need GSP / ASP credentials?

No. 4notify works with the acknowledgement envelopes that the ERP emits; the GSP/ASP connection to IRP remains inside the taxpayer's accounting stack.

What about the e-Way Bill?

The e-Way Bill flows alongside the IRN — when the ERP emits an EWB number, 4notify routes the alert (driver, vehicle number, expiry) to the logistics contact on the same envelope.

Issued
4notify Office of Operations
2026-05-27 · TP-IN-004

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