The US has maintained its blockade of Iranian ports, while Iran has lifted and then re-imposed its blockade of the Strait of Hormuz, through which roughly a fifth of the world’s oil and liquefied natural gas passed before war broke out in the Middle East. Amid ceasefire talks, Tehran, which controls the chokepoint, has proposed tolls for vessels to transit safely.
MARISKS on Monday issued an alert warning shipowners that unknown actors, claiming to represent Iranian authorities, had sent some shipping companies a message demanding transit fees in cryptocurrencies, Bitcoin or Tether, for “clearance”.
“These specific messages are a scam,” the firm said, adding the message was not sent by Iranian authorities.


