© Caribeez.com

The Aruban government states that U.S. citizens must have a valid passport to visit Aruba because the U.S. requires a passport for its citizens to re-enter the U.S., but U.S. regulations require a passport only for visitors returning by air.

Canadian citizens require a valid passport to visit Aruba. Visitors to Aruba may be asked to show onward/return tickets, proof of sufficient funds and proof of lodging accommodations for their stay.

U.S. Citizens
Under the Western Hemisphere Travel Initiative, special rules apply to U.S. citizens traveling to Mexico, Bermuda and certain destinations in the Caribbean*

U.S. citizens traveling by air are required to have a passport to re-enter the States. Anyone traveling by land or sea needs to present either (a) a passport, passport card or WHTI-compliant document; or (b) a government-issued photo ID, such as a driver’s license, along with proof of citizenship, such as a birth certificate.

As of June 1, 2009, most U.S. citizens entering the United States at sea or land ports of entry are required to show a passport, passport card, or WHTI-compliant document. They will no longer be allowed to use a government-issued photo ID as proof of citizenship.

The U.S. government recommends traveling with a valid U.S. passport to avoid delays or misunderstandings while visiting other countries. A lost or stolen passport is also easier to replace when outside of the United States than other evidence of citizenship. 

For information, travelers may contact the Royal Netherlands Embassy, 4200 Linnean Avenue, N.W., Washington, D.C. 20008, telephone (202) 244-5300, or the Dutch Consulate in Los Angeles, Chicago, New York, Houston or Miami.

Canadian Citizens
A Canadian passport is required for Canadians intending to visit the Netherlands. The passport should be valid for at least three months beyond the date of the expected departure from the country.

These requirements are subject to change at any time. It is the traveler's responsibility to check with the Royal Netherlands Embassy and its consulates, for up-to-date information.

Sources
U.S. State Department: http://travel.state.gov/travel/cis_pa_tw/cis_pa_tw_1168.html
Canadian Consular Affairs: http://www.voyage.gc.ca/consular_home-en.asp
Aruba Government: http://www.aruba.com/pages/entryrequirements.htm/

* Anguilla, Antigua and Barbuda, Aruba, Bahamas, Bermuda, British Virgin Islands, Cayman Islands, Dominica, Dominican Republic, Grenada, Jamaica (except for business travel), Montserrat, Netherlands Antilles, St. Kitts and Nevis, St. Lucia, St. Vincent and the Grenadines, and Turks and Caicos.