[Johny Poker]

You could send a letter to FTP online via e-mail, or find an address by other means. As far as FTP "submitting itself" to a court, they have no choice. US courts would decide that they have personal "long arm" jurisdiction over an entity like FTP that conducts business with it's residents. In fact, most states have long arm statutes that set forth conditions for such jurisdiction. This happens frequently with websites that have no physical assets in the US. You file suit, and serve the complaint. If they fail to show, you get a default judgment, which can then be enforced in the foreign jurisdiction. But it would likely never get this far. A lawyer could for example recommend the common strategy of filing the complaint without serving it, and then explaining such to the defendant with a suggestion of settlement.