He said that the tariff is $1 per barrel of oil, adding that empty tankers can pass freely. “Once the email arrives and Iran completes its assessment, vessels are given a few seconds to pay in Bitcoin, ensuring they can’t be traced or confiscated due to sanctions,” Hosseini added.
I never even considered the insurance side there. But it is legit proof of delivery and it gives them at least a chance of recovery if someone fucks up cleaning them.