Blotter can mean several things:-
- For blotter acid, see LSD
- For a desk blotter, see desk
- For an antique blotter associated with a quill pen, see fountain pen and blotting paper.
- Blotter can also refer to an official summary, usually covering a short duration, such as a police blotter, or the trade confirmation summary of a financial institution. The term is frequently used in financial institution software terms to represent a list of current trades in a spreadsheet-like interface whose status is updated in real-time. The trades are often highlighted in different colours depending on their status.
- Blotter, an American TV show, parodying the long running TV show, COPS, preceding Reno 911!.
- Blotter, a 1996 album by the American band Nighstick.