DNB Details Layered Defenses Against ATM Explosive Attacks and Laundering of Stolen Cash

Key Takeaways

• DNB and the Netherlands Forensic Institute (NFI) outlined a three-line defense against explosive ATM attacks: hardened machines, banknote-staining systems with ink, glue, and synthetic DNA, and refusal of soiled notes by businesses and consumers.
• This is an awareness-focused press release rather than a new rule, but it signals supervisory expectations on cash security, physical risk, and handling of stolen-note proceeds.
• Compliance teams at banks, cash handlers, and retailers should confirm that their controls reflect these expectations.

Deep Dive

DNB and the Netherlands Forensic Institute (NFI) outlined a three-line defense against explosive ATM attacks: hardened machines, banknote-staining systems with ink, glue, and synthetic DNA, and refusal of soiled notes by businesses and consumers. This is an awareness-focused press release rather than a new rule, but it signals supervisory expectations on cash security, physical risk, and handling of stolen-note proceeds. Compliance teams at banks, cash handlers, and retailers should confirm that their controls reflect these expectations.

The three lines of defense are as follows. First, ATM hardening has largely eliminated methods such as the "pizza slice" flash powder technique, gas injection, and ramming or pulling machines loose with vehicles. Second, banknote protection includes glue that clumps notes and indelible ink that stains notes and the clothing of criminals. Synthetic DNA mixed with the ink carries a unique code that lets the NFI trace a note to a specific machine, whether in Munich, Gouda, or Sofia, and produces forensic evidence. Third, DNB expects shopkeepers, businesses, and consumers to reject soiled notes. Indicators include dark green or dark blue ink spreading from the edges toward the center, discoloration, and damaged security features such as chipped or missing holograms and color strips.

For compliance teams, the practical implications span several areas. Banks, ATM operators, and cash-in-transit providers should confirm that their ATM fleets use current-generation protection, including note-staining devices, and that security standards are applied consistently to all deployed machines. Cash-handling and teller procedures should include detection of stained or chemically treated notes, with clear escalation paths. Retailers and cash-intensive customers should be reminded to screen notes. Suspected stained notes should be reported to the police and routed to the NFI rather than quietly returned to circulation.

From an AML perspective, deposits of stained, discolored, or altered notes should be treated as red flags. Transaction monitoring and customer due diligence for cash-intensive clients should consider such indicators, and these cases may require suspicious transaction reporting. Operational risk teams should also review physical security, business continuity for affected branches and sites, insurance coverage, and incident reporting protocols. Because DNB leads cash policy and oversight, firms should expect continued supervisory attention on cash logistics security and on cooperation with law enforcement. Overall risk impact is moderate: the trend is positive, but the residual threat of laundering and physical harm remains.

Source: De Nederlandsche Bank