Government 10 min readMar 22, 2026

Modernizing government tax stamps with digital authentication

How revenue authorities are recovering billions in excise leakage through unit-level digital stamps.

Sanjay Rao

Public Sector Advisor

Physical excise stamps are systematically forged in every major market. Digital stamps backed by NBR raise the forgery cost by orders of magnitude.

Three revenue authorities we advised recovered between 8% and 17% of prior-year excise leakage in the first 12 months.

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Counterfeits erode revenue, but the deeper damage is to brand equity, consumer trust and regulatory standing.

Standard QR codes are trivially copyable. Non-Reproducible Barcodes shift authentication from readable to physically unclonable.

Boards are no longer asking 'where is the shipment?' — they are asking 'can we prove it was never tampered with?'

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