Tether freezes $131M as Iran crypto maritime sanctions hit IRGC Bitcoin toll

A protection racket with a crypto twist — that is what US authorities say Iran has been running through one of the world’s most critical oil chokepoints. The US Treasury’s Office of Foreign Assets Control has sanctioned two Iranian firms at the center of an Iran crypto maritime sanctions action targeting a scheme that forced commercial vessels to buy mandatory insurance just to pass through the Strait of Hormuz, with payments accepted in Bitcoin and other digital assets to sidestep Western financial controls.

Key takeaways

• OFAC sanctioned Persian Gulf Marine Insurance Company and HormuzSafe Marine Services Authority for running an IRGC-backed maritime extortion scheme.
• Iran charged tankers approximately $1 per barrel as a transit fee through the Strait of Hormuz.
• HormuzSafe accepted Bitcoin and other digital assets as payment to circumvent Western sanctions.
• Both entities were designated under Executive Order 13902 for operating in Iran’s financial sector.
• Tether froze $131 million in USDT linked to cryptocurrency wallets sanctioned in mid-July as part of the broader enforcement push.

US Treasury Targets Iran’s Crypto-Backed Maritime Toll Scheme

The designations hit two firms accused of operating under the umbrella of the Iranian Revolutionary Guard Corps: the Persian Gulf Marine Insurance Company and HormuzSafe Marine Services Authority. According to the US Treasury, both entities were central to a scheme that extracted mandatory insurance fees from ships navigating the Strait of Hormuz — one of the busiest and most strategically sensitive waterways on Earth, through which roughly a fifth of the world’s oil passes daily.

Treasury Secretary Scott Bessent was blunt about the context. “With its economy in freefall and inflation in the triple digits, the regime is desperate for cash,” he said, linking the scheme directly to Iran’s deteriorating economic conditions.

Sanctioned Entities and Their Role

Iran’s Ministry of Economy developed HormuzSafe, which offers insurance, traffic control, security, and emergency response services to vessels transiting the strait. On the surface, it looked like a commercial maritime services provider. In reality, according to Treasury, it was an arm of the IRGC collecting revenue through coercion.

The Persian Gulf Marine Insurance Company issued the policies, which were approved by the Persian Gulf Strait Authority — itself previously sanctioned by OFAC on May 27. Together, these two entities formed the financial backbone of the toll network, with HormuzSafe serving as the payment-processing and services layer and PGMIC providing the insurance wrapper that gave the scheme a veneer of legitimacy.

Purpose and Mechanics of the Insurance Scheme

The core logic of the scheme is almost brazen in its circularity. The IRGC began collecting transit fees from tankers in April, charging approximately $1 per barrel of cargo. The insurance policies sold by PGMIC were then structured to cover the very risks Iran itself creates — including vessel seizures and harassment by IRGC naval forces. Pay the fee, get the insurance against the threat you just paid to avoid. The Treasury described it plainly: the policies extract revenue while covering risks that Iran itself generates.

What made the scheme particularly difficult to disrupt was its payment infrastructure. HormuzSafe accepted Bitcoin and other digital assets, deliberately routing payments away from traditional banking channels where US sanctions carry the most enforcement weight. By processing transactions on-chain, Iran’s operators could collect revenue from international shipping companies without touching a correspondent bank or triggering a SWIFT flag.

That is not a minor detail. It represents a deliberate architectural choice: build the financial plumbing outside the reach of Western regulators. Reports had already surfaced as early as May 2026 about Iran’s Bitcoin-settled insurance initiative for Hormuz transit, suggesting HormuzSafe was part of a broader effort to construct a digital financial system that operates outside Western control, according to Crypto Briefing.

Legal Framework and Additional Sanctions

OFAC designated both entities under Executive Order 13902, which targets Iran’s financial sector broadly. The legal authority is broad enough to cover any entity operating within that sector, regardless of whether it presents itself as an insurer, a maritime services firm, or a technology platform.

Sanctions on Shipping Companies and Oil Tankers

OFAC also sanctioned eight shipping companies and designated eight oil tankers as blocked property. The operators are registered in Hong Kong, the Marshall Islands, and China — a spread of jurisdictions that illustrates just how globally dispersed Iran’s shadow fleet has become. The vessels were involved in transporting Iranian crude oil and petroleum products.

According to the Treasury, the agency has sanctioned more than 100 shadow fleet vessels since January, making the latest round part of a sustained, rolling enforcement campaign rather than a one-off action.

Tether’s $131 Million Freeze

The enforcement pressure also had a direct on-chain dimension. In mid-July, the Treasury sanctioned four cryptocurrency wallets linked to Iran’s central bank. Tether, the issuer of the world’s largest stablecoin by market cap, simultaneously froze approximately $131 million in USDT held in those addresses. It is a signal of how crypto enforcement has evolved: regulators are now coordinating directly with stablecoin issuers to freeze funds at the wallet level, not just blacklist addresses after the fact.

Why This Matters Beyond the Headlines

The HormuzSafe case exposes a tension at the heart of blockchain technology. The same transparency that makes on-chain transactions traceable for law enforcement also makes them useful for sanctions evasion — because what looks like a payment from a shipping company to a maritime insurer reveals nothing about the IRGC connection unless you already know to look. Iran was betting that the commercial wrapper would obscure the underlying extortion network long enough to generate meaningful revenue.

The broader implication is that Iran’s crypto-enabled maritime sanctions evasion is no longer a fringe tactic. It has become an institutionalized revenue stream, developed by a government ministry, backed by a paramilitary force, and integrated into global shipping infrastructure. For regulators, the challenge is not just identifying illicit wallets — it is unpicking commercial-looking transactions embedded in real supply chains, often spanning multiple jurisdictions with conflicting enforcement priorities. The connection between Iran’s shadow fleet and operators in China, Hong Kong, and the Marshall Islands underscores that crypto enforcement is increasingly a geopolitical coordination problem, not just a technical one.

FAQ

What is the nature of the maritime toll scheme sanctioned by OFAC?

Two Iranian firms backed by the IRGC ran a scheme forcing vessels to buy mandatory maritime insurance to transit the Strait of Hormuz. The policies covered risks that Iran itself created, such as vessel seizures by IRGC naval forces, effectively turning the threat into a revenue source.

How does Iran use cryptocurrency in its maritime insurance scheme?

HormuzSafe accepted payments in Bitcoin and other digital assets, allowing Iran to collect transit fees from international shipping companies while bypassing traditional banking channels subject to Western sanctions enforcement.

Under what authority were these Iranian entities sanctioned by OFAC?

Both the Persian Gulf Marine Insurance Company and HormuzSafe Marine Services Authority were designated under Executive Order 13902, which targets entities operating in Iran’s financial sector.

What additional actions did OFAC take in relation to Iran’s maritime activities?

Beyond the two insurance entities, OFAC sanctioned eight shipping companies registered in China, Hong Kong, and the Marshall Islands, and designated eight oil tankers as blocked property for their roles in transporting Iranian crude oil and petroleum products.

Article produced with the assistance of artificial intelligence and reviewed by the editorial team.