[davidzweig]

Not sure, but possibly, not much? Foreigners are given a pass on many issues. For example, you can easily rent a hotel room with your unmarried partner without a marriage certificate.

[tjoff]

I'd imagine you are right, at least today. Worth the risk?

[davidzweig]

That's a personal decision, but I would say yes. Iran is a great place to visit, but a bit complicated as a UK/US citizen.