An assessment order lacking a mandatory Document Identification Number is completely invalid and non-est.
Issue
Whether a GST assessment order passed without a Document Identification Number (DIN) is legally sustainable, and whether such an order can be challenged via a writ petition after a statutory appeal against it has already been rejected as time-barred.
Facts
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A GST assessment order was issued to the petitioner by the Assessing Officer (AO).
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The petitioner filed a statutory appeal against the assessment order, but this appeal was rejected by the appellate authority on the grounds of being time-barred.
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The petitioner then filed a writ petition before the High Court, asserting that the original assessment order was legally invalid because it lacked a mandatory Document Identification Number (DIN).
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The revenue department contested the writ petition, arguing that the challenge was not maintainable since the petitioner had already failed in their statutory appeal.
Decision
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Orders Without DIN are Non-Est: The High Court relied on the Supreme Court precedent in Pradeep Goyal v. Union of India [2022], which established that any communication or tax order issued without a valid DIN is completely non-est (does not exist in the eyes of the law) and invalid.
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Maintainability of Core Challenge: The Court followed the Division Bench ruling in Kali Shankar Enterprises v. Additional Commissioner [2024], holding that a direct challenge to the validity of an original order remains maintainable even if a subsequent statutory appeal has already been disposed of or rejected.
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Objection Overruled: The revenue’s procedural objection regarding maintainability was declared untenable in light of these binding precedents.
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Order Quashed and Remanded: Because the impugned assessment order carried no DIN, it was declared non-est and set aside. The matter was remitted back to the Assessing Officer to pass a fresh order in strict accordance with the law.
Key Takeaways
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DIN is an Absolute Prerequisite: A Document Identification Number is not a superficial formatting detail; its absence strips a tax order of all legal legitimacy, rendering it completely void from its inception.
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Fundamental Invalidity Bypasses Procedural Lapses: If an initial assessment order is fundamentally non-est in law, a taxpayer’s subsequent failure to meet a statutory appeal deadline cannot magically breathe life into that invalid order or block a constitutional writ remedy.
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Scope of Re-adjudication: When an order is quashed solely due to the omission of a DIN, the revenue retains the liberty to rectify the technical error by initiating the assessment process again and issuing a fresh, properly authenticated order.

