U.S. citizens traveling to Serbia and Montenegro for business or tourist or official or diplomatic purposes do not need visa for a maximum stay of 90 days. A valid US passport (must be valid 3 months beyond intended stay) is required.
Register your trip on-line with the U.S. Embassy in this country. Millions of Americans travel abroad every year and encounter no difficulties. However, U.S. embassies and consulates assist nearly 200,000 Americans each year who are victims of crime, accident, or illness, or whose family and friends need to contact them in an emergency. When an emergency happens, or if natural disaster, terrorism, or civil unrest strikes during your foreign travel, the nearest U.S. embassy or consulate can be your source of assistance and information. By registering your trip, you help the embassy or consulate locate you when you might need them the most. Registration is voluntary and costs nothing, but it should be a big part of your travel planning and security.