Step 01
PDF stamped with IRN + QR
IRN-stamped PDF rendered automatically with the GSTN-signed QR code. Standard layout, brand-customisable header.
GST E-Invoicing Software | E-Invoice QR & PDF
IRN-stamped PDF with signed QR. Customer-ready in seconds.
On IRN return, the customer PDF is stamped automatically with the IRN, the signed QR (containing the GSTN-validated invoice details) and the EWB if applicable. The PDF is the legal copy. Send via email, vendor portal or WhatsApp from the same screen.
How it works
From IRN response to customer inbox.
Step 02
Signed QR carries the data
The QR encodes the GSTN-signed digest of the invoice fields. Buyers can scan and validate directly on the GSTN portal.
Step 03
Send by email, portal or WhatsApp
Send to the customer email captured at the customer master. Portal upload for B2B customers using OneFinOps. WhatsApp for SME customers.
Step 04
Read-receipt and resend
Email open and click tracked. Vendor portal download captured. Resend in one click if the customer reports non-receipt.
What the system does
Capability, input, output.
| Capability | Input | Output |
|---|---|---|
| IRN PDF rendering | IRN response + invoice | IRN-stamped customer PDF |
| Signed QR | GSTN-signed digest | Scannable QR on the PDF |
| Email send | Customer email + PDF | Email sent with read-receipt |
| Portal delivery | B2B customer portal account | Portal upload + notification |
| WhatsApp send | Customer WhatsApp opt-in | WhatsApp delivery with download link |
-
IRN PDF rendering
- Input
- IRN response + invoice
- Output
- IRN-stamped customer PDF
-
Signed QR
- Input
- GSTN-signed digest
- Output
- Scannable QR on the PDF
-
Email send
- Input
- Customer email + PDF
- Output
- Email sent with read-receipt
-
Portal delivery
- Input
- B2B customer portal account
- Output
- Portal upload + notification
-
WhatsApp send
- Input
- Customer WhatsApp opt-in
- Output
- WhatsApp delivery with download link
Compliance + integrations
PDF + QR per the GSTN spec.
IRN, QR and PDF format follow the GSTN specification. The QR carries the cryptographic signature; buyers can validate independently. Brand customisation does not alter the GSTN-required fields.
Regulations we work within
-
Rule 48(4), CGST Rules
IRN-stamped invoice in the prescribed format.
Connects to
- Email (SMTP) Direct send
- WhatsApp Business API Templated send
- Customer portal B2B portal upload
E-Invoice QR & PDF FAQ
What buyers ask.
Can we customise the PDF layout for our brand?
Yes. The header, logo, colour scheme and footer are customisable. The GSTN-required fields (IRN, QR, signed values) are preserved in the prescribed positions.
Can the customer validate the QR independently?
Yes. The QR encodes the GSTN-signed digest. Customers can scan and validate on the GSTN portal or via any GSTN-compatible reader.
WhatsApp delivery. Are we storing the customer phone number under DPDP?
WhatsApp delivery requires explicit customer opt-in captured at the customer master. The number is stored with consent and retention per DPDP Act 2023. Opt-out clears the consent and stops WhatsApp sends.
More in GST E-Invoicing Software
Related features
See your IRN-stamped PDF.
Connect one GSTIN, free. Raise a test invoice; receive the IRN-stamped PDF with signed QR. Send to a test email or portal in one click.