A valid passport, visa, and proof of onward/return ticket are required. As of August 2007, the Bissau-Guinean Embassy in Washington, D.C. remains temporarily closed. The Embassy of Guinea-Bissau does not have a web site. Due to lack of consular representation in the U.S., it is difficult to obtain the required visa for entry into Guinea-Bissau. Since most flights destined for Guinea-Bissau must pass through Dakar, Senegal or Lisbon, Portugal, most travelers are able to apply for visas at the Bissau-Guinean embassies in those countries. Although it is possible to obtain a visa upon arrival in Bissau if arrangements are made in advance, there are no clear instructions for how to make those arrangements.