Contact Congress about S. 556: Enhanced Iran Sanctions Act of 2025

Foreign companies and people that help Iran move or sell energy products could face U.S. asset freezes and visa bans. The bill also builds a government enforcement group and encourages joint action with allied countries.

Modern Action explains what the legislation does, helps you choose whether to support, oppose, or ask for changes, and drafts a message tied to the bill, your stance, and the elected officials who can act on it.

Enhanced Iran Sanctions Act of 2025 is a Senate bill in committee. The latest recorded action: Read twice and referred to the Committee on Foreign Relations.

Latest action on S. 556: Read twice and referred to the Committee on Foreign Relations.

Who this affects: This bill mainly affects foreign businesses and people involved in Iran’s energy trade. The closest impact falls on banks, insurers, shippers, registries, pipeline operators, trading firms, company leaders, and some family members if they are linked to covered activity. U.S. agencies would also have new enforcement and coordination duties, and allied governments could face more pressure to work with the U.S. on sanctions.

Why this matters: This bill matters because it tries to cut off more of the money and services that help Iran sell energy abroad. Instead of focusing only on direct buyers, it goes after the wider business network behind the trade. That could raise legal and financial risk for foreign companies that deal with Iranian energy. How much it changes real-world behavior would still depend on enforcement, waivers, and whether other countries and companies cooperate.

Key provisions in S. 556

• Foreign people and companies that knowingly help Iran move or sell oil, gas, liquefied natural gas, or petrochemicals would have to be sanctioned. That includes banks, insurers, shipping registries, and liquefied natural gas pipeline facilities.
• The bill reaches beyond the main actor. It also covers subsidiaries, successor companies, aliases, entities that are 50% or more owned or controlled by a sanctioned person, certain corporate officers, and some immediate family members.
• A sanctioned target’s covered property would be frozen if it is in the United States or comes under the control of a U.S. person. That means the person could lose access to money, assets, and property interests tied to the U.S.
• Sanctioned foreign individuals could not get U.S. visas or enter the country. Their existing visas must be revoked, except in narrow cases tied to U.N. Headquarters duties or U.S. law enforcement needs.
• The bill does not require the U.S. to sanction imports of goods into the country. It carves that out using the bill’s own definition of "goods."

How Modern Action helps you take action on S. 556

You do not have to start with a blank letter. Modern Action turns the bill, your position, and the relevant congressional context into a message you can edit and send. The goal is to make contacting Congress clear, specific, and useful without forcing you to parse bill text or figure out the right office on your own.

Questions people ask about S. 556

What is S. 556?

Foreign companies and people that help Iran move or sell energy products could face U.S. asset freezes and visa bans. The bill also builds a government enforcement group and encourages joint action with allied countries.

How do I support or oppose S. 556?

Choose support, oppose, or ask for changes on Modern Action. The action flow drafts the message for you and keeps the wording tied to this bill.

Who should I contact about S. 556?

Modern Action uses your location to route the action to the congressional offices relevant to the bill and your representation.

How does Modern Action help me act on S. 556?

Modern Action gives you bill-specific context, lets you choose support, opposition, or changes, and drafts a message from your position and reasons.