An interesting e-commerce site that went online just last week is accepting bitcoin only, because most overseas customers cannot pay with anything else.

The business is Persian Shoes, an over 70-year-old business selling handmade footwear. It is located in Isfahan, the third-largest city in Iran.

The owners are happy to ship anywhere, but paying them is a problem. Thanks to the vagaries of international diplomacy and the past few decades of history, the usual e-commerce channels are blocked.

Trade sanctions against the entire country of Iran by the United Nations, United States, European Union and others mean Western Union and major credit card companies will not deal with Iranian businesses, even those in the fashion world.

The only way to pay someone in Iran is with cash carried in your pocket - or some easily transferrable, mostly unregulated, digital currency.

The bitcoin-only store sold four pairs of shoes in its first day of business. "To my standards it is a good sale!" said the CEO, Mor Roghani. The store's success continued throughout its first week.

"We have sold ten pairs of shoes so far using bitcoin. This is way above our expectations," he added.

Persian Shoes is currently operated by three brothers, who are keen to expand the business their father started. Roghani's cousin, who lives in Australia, introduced them to bitcoin and helped them to set up the site.

The site currently offers leather handbags, purses and shoes for women and seven varieties of shoes for men. Prices are all listed in USD and start around US $80.

Its FAQ page explains bitcoin and guides new users to online services like Coinbase, Bitstamp and BitBargain, as well as LocalBitcoins. It also explains the trade situation:

As well as international trade restrictions, exchanging bitcoin back into local currency (Iranian Rials) also faces knowledge and technical barriers.

"Exchange is a bit tricky because bitcoin is not common yet. We are planing to hold onto some of the bitcoins and sell some at localbitcoins," Roghani said. A lack of online shopping culture locally and poor internet connectivity hinders trade with other parts of Iran.

Depending on your country of citizenship or residence, you may not actually be allowed to buy these shoes even with bitcoin. Just as Americans may not spend a weekend in Havana or enjoy real Cuban cigars, they are also forbidden to engage in any trade activity with businesses or individuals located in Iran.

Despite this, Persian Shoes has taken orders from customers in the US and is waiting to see how smoothly the deliveries go before advertising the business more widely (update: all US orders have reached their destinations so far without problems.)

A query sent to United States Customs and Border Protection (part of the Department of Homeland Security) asking specifically about private e-commerce transactions for items of clothing received the following response: "Unfortunately, sanctions against Iran prohibit this."

Government agencies in other countries are less clear about this sort of purchase, or did not respond to questions.

Most international sanctions target trade in goods related to technology or industrial equipment, but are less specific about personal transactions for everyday items (probably due to lack of payment options) and definitely do not mention shoes.

You are, however, still free to Like Persian Shoes' Facebook Page and browse the store.