Syrian businesses operate out of Jordan's largest refugee camp
9 August 2013 Last updated at 11:11 BST
Zaatari refugee camp in Jordan is home to more than 120,000 migrants who've fled the conflict in neighbouring Syria. It is managed by the United Nations.
The camp has grown so big it has an internal economy all of its own, complete with restaurants, taxi firms and even a wedding dress hire shop.
So how are the legitimate businesses faring? And what efforts are being taken to curb the camp's illicit economy?
Howard Johnson reports.