Bearers of diplomatic or official passports are not permitted to purchase airport visas and will be denied exit from the Istanbul airport. Only bottled water should be used. Travellers should bring sufficient cash to pay for all in-country expenses. Credit cards and travellers checks are not generally accepted in Azerbaijan. Western commodities are increasingly available in Baku, but they are expensive and supplies are unreliable.
Police stops and checkpoints are common.
Visitors should keep their passports or a copy with team at all times. Baku's level of crime is comparable with that of major U.S. cities. Individuals should avoid walking alone after dark, and should be aware of their surroundings at all times.