All Passengers (one per family) are required to complete a Customs Declaration form before arrival in the U.S. The forms are distributed during flight and should be completed, in English, in all capital letters. Please be certain to sign your name on the bottom of the form.
All visitors to the US, except nationals of Canada, are required to register under the US-VISIT (Visitor and Immigration Status Indicator Technology) program on arrival at any US port. This means that they will be photographed and electronically fingerprinted at the Immigration desk. This system will also record departure information, and self-service machines for this purpose are being phased in at various airports. You will be advised on arrival if your airport has this facility. More information can be found at the US Department of Homeland Security website.
All foreign nationals (except Canadian citizens and US permanent residents) are required to complete an immigration (I94) form before arrival in the United States. Fill out one for each family member. Do not write on the back. Write in English with all capital letters. Keep the form until your departure from the U.S.
From the U.S. State Department:
ENTRY/EXIT REQUIREMENTS: All Americans traveling by air outside of the United States are required to present a passport or other valid travel document to enter or re-enter the United States. This requirement will be extended to sea travel (except closed loop cruises), including ferry service, by the summer of 2009. Until then, U.S. citizens traveling by sea must have government-issued photo identification and a document showing their U.S. citizenship (for example, a birth certificate or certificate of nationalization), or other WHTI compliant document such as a passport card for entry or re-entry to the U.S. Sea travelers should also check with their cruise line and countries of destination for any foreign entry requirements.
Applications for the new U.S. Passport Card are now being accepted. Based on current projections, we expect to begin production of the passport card in June 2008 and be in full production in July 2008. The card may not be used to travel by air and is available only to U.S. citizens. Further information on the Passport Card is available HERE and upcoming changes to U.S. passport policy can be found on the Bureau of Consular Affairs web site. We strongly encourage all American citizen travelers to apply for a U.S. passport well in advance of anticipated travel. American citizens can visit travel.state.gov or call 1-877-4USA-PPT (1-877-487-2778) for information on how to apply for their passports.