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Overview

Under GST Rule 46, every tax invoice must be authenticated. Fincelo supports digital signatures on all invoices to ensure compliance with GST Rule 46 requirements.

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What Gets Signed

Every Tax Invoice generated by Fincelo includes:
  • Digital signature of the authorised signatory
  • Signatory name and designation
  • Date and time of signing
  • Certificate details
Proforma invoices are not digitally signed (they are not tax documents).

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Setup

  1. Obtain a Digital Signature Certificate (DSC) from a licensed CA
    • Class 3 DSC required for GST purposes
    • Providers: eMudhra, Sify, (n)Code Solutions
  2. Fincelo → Settings → Compliance → Digital Signature
  3. Upload your DSC (.pfx file)
  4. Enter the DSC password
  5. Set the authorised signatory name and designation
  6. All future invoices are signed automatically

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Validity

DSCs are typically valid for 1–3 years. Fincelo:
  • Tracks your DSC expiry date
  • Sends a reminder 30 days before expiry
  • Blocks invoice generation if DSC has expired (with clear error message)

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IRN and Digital Signature

When e-invoicing is active:
  • The IRN itself serves as authentication for the invoice
  • Digital signature provides an additional layer of compliance
  • Both appear on the invoice PDF