How do I stop the same invoice being counted twice in my carbon figures?
Give every invoice one identity: supplier GSTIN plus invoice number, or a file fingerprint. Check every new upload against that list before it is added. Duplicates usually arrive as a scan and an email copy of the same bill, or a revised invoice that replaces an older one.
Common ways it happens
- Scan and emailed PDF of the same bill.
- A revised invoice that replaces an earlier one.
- Two people uploading the same month.
What to keep
Keep the replaced invoice on file but marked as superseded, so the trail shows why only one counts.
What Senseible does here
Senseible fingerprints every document, so the same bill uploaded twice is recognised and counted once.
Sources: GHG Protocol Corporate Standard, ISO 14064-3, verification of greenhouse gas statements (iso.org)
Last reviewed 2026-10-22.