Intelligent banknote neutralisation system

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An intelligent banknote neutralisation system (IBNS) is a security system, that is used by banks, ATMs, retail establishments, vending machines^{[citation needed]} and the cash-in-transit industry, to render stolen funds un-useable and easily identifable. Dye packs are inserted between bills in random bundles. If a bundle containing a dye pack is removed from a specified area (i.e. taken out of bank doors), it explodes, releasing an indelible ink dye and possible array of additional chemicals. The conspicuous bright color (usually red) stains on the bills, allow quick easy visual recognition of stolen money. Tracers and markers can also be added to the ink or bonding agent providing forensic evidence linking the criminal to the crime. Bonding agents (i.e. glues) have been used more recently.

Stained bills cannot be brought back into circulation easily, because they are visually and/or forensically linked quickly to the crime scene. Restricted procedures are globally in place in case of an attempt to exchange them at any financial institutions.^{[citation needed]}