Since January 2007, the citizens of the United States are exempted from securing visas to travel to Moldova. However, you will need a passport to enter the country. US passports should at least have 6 months remaining validity.
Foreign nationals who are granted visa-free entrance are permitted to stay up to 90 days within a six-month period. Those who are staying for more than 90 days must obtain a residence permit.
Upon arrival at the Chisinau airport, all visitors are automatically registered. US nationals who enter through the separatist region of Transnistria must register personally at the right-bank (western) Moldova within three days of arrival. The Ministry of Information Development registration office is located in central Chisinau.
Additional information on entry requirements is available at:
Embassy of the Republic of Moldova
2101 S Street NW
Telephone: (202) 667-1130
Fax: (202) 667-1204