On October 11, 2018, the US Financial Crimes Enforcement Network published Advisory FIN-2018-A006 about Iranian attempts to exploit the financial system. Virtual currency occupied only one part of a much broader document covering front companies, exchange houses, precious metals, shipping and other methods associated with sanctions evasion.
What FinCEN actually reported
The advisory said that, from 2013, activity connected with Iran included at least $3.8 million per year in bitcoin-denominated transactions. FinCEN described that amount as comparatively small. Its concern was forward-looking: online exchanges and peer-to-peer brokers could provide additional channels for moving value when conventional financial access was restricted.
That distinction matters. The document did not declare that cryptocurrency use by every Iranian person was illegal, nor did it establish that all Iran-linked transactions were sanctions evasion. It told financial institutions to apply their existing Bank Secrecy Act and sanctions controls, examine context and report activity that met the applicable standards.
Where blockchain evidence fitted
Public ledgers gave investigators a source of transaction evidence, but addresses alone did not prove who controlled funds. FinCEN encouraged institutions to combine blockchain analysis with customer information, payment records and signs involving foreign exchanges or peer-to-peer services. The approach was risk-based rather than a blanket prohibition based on technology.
The same principle remains useful when reading regulatory claims: a trace on a ledger is evidence of movement, not automatic proof of identity, intent or criminal conduct. Attribution requires corroboration.
June 2025 changed the status of the document
FinCEN now marks FIN-2018-A006 as rescinded as of June 6, 2025. The agency replaced the old document as risks, sanctions programs and financial channels changed. That status is essential context. A historically accurate archive can explain what authorities said in 2018 without presenting superseded instructions as current compliance advice.
Current decisions should therefore rely on the latest material from FinCEN’s advisory program and the relevant sanctions authorities. The 2018 document remains valuable as a record of how US regulators first framed cryptocurrency within Iran-related illicit-finance monitoring.
The record does not show that cryptocurrency had become Iran’s dominant financial rail. FinCEN’s own figures did not support that conclusion. Instead, the advisory showed regulators integrating blockchain transactions into established anti-money-laundering and sanctions frameworks while warning that a small channel could grow or help conceal activity.
Read in that limited way—and alongside its 2025 rescission—the document is a regulatory milestone rather than a timeless accusation.
Using a rescinded advisory as a historical source
A contemporary compliance team should not copy red flags from a rescinded advisory without checking their replacement and the sanctions rules in force. An editorial archive has a different purpose: it can preserve the sequence of regulatory thinking while labelling later changes. That means retaining the original issue date, linking to the agency’s status notice and avoiding language that treats nationality or geography alone as evidence of wrongdoing.
The episode also predates the much larger institutional digital-asset market that followed. Comparisons with current activity must account for changes in liquidity, stablecoins, analytics and enforcement. The 2018 figures are a historical snapshot, not a baseline that can be projected mechanically into the present.
