GST
Duplicate invoice numbers by mistake
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Facts
Invoice numbers must be unique for the financial year. A duplicate breaks Rule 46(b) and can cause GSTR-1 and IRP rejections.
Provisions and law
- Rule 46(b), CGST Rules 2017Serial number in one or more series using letters, numbers, hyphen and slash, up to 16 characters, unique for the financial year
Analysis
Cancel one of them, through a credit note if already reported, and reissue with a fresh number. Inform the buyer so their ITC tracks the correct invoice. For e-invoices, the IRP will reject the duplicate anyway.
Conclusion
- Identify both invoices.
- Cancel one through credit note or cancellation.
- Reissue with a new number.
- Inform the buyer and correct GSTR-1.
A Savvy can do this for you
Invoice series, numbering and document summary (GSTR-1 Table 13)
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