He also cautioned that for Americans, “it doesn’t matter how many passports you have, you must enter and leave with a U.S. passport.”

Image Alessandro Pappalardo, who lives in New York, has passports from Italy, the United States and Argentina. Credit... Suzanne DeChillo/The New York Times

In addition, he recommended that anyone considering dual passports think first of the tax consequences and the potential for military service, though, he added, “you can get exemptions for all of this because you’re a U.S. citizen.”

Israel allows anyone of Jewish heritage to use what is called aliyah, or the Law of Return, to become a citizen, but the military draft can be an issue. Noam Greenberg, a press officer with the Israeli Consulate in New York, said that the maximum age for the draft is 28 for men and 22 for women, although married women are exempt at any age. Americans can apply for exemptions.

The draft was an issue for Abdullah Daglioglu, an actor whose stage name is Neil Malik Abdullah. Born in Austria to parents from Turkey, he has both nationalities, but avoided Turkey because, he said, “I would have to do the military.” He lives in Germany and works on films throughout the European Union. “I can act in movies all over Europe,” he said. “There’s no visa necessary.”

Mr. Daglioglu, who played one of the Sept. 11 terrorists, Ahmed al-Haznawi, in the British television movie “Hamburg Cell,” said he used his Austrian passport for the United States visa that he needed for part of the filming in Florida.

On paper, there was “no background showing I am actually Turkish,” Mr. Daglioglu said. “It’s easier to travel with the Austrian passport because it is European, rather than the Turkish passport. Everybody makes a problem when your last name is Abdullah.”

Ruth Yoffe also has dual passports. She started Reloop Designs, a company that hires handicapped people in Cambodia to weave colorful baskets from recycled plastic bags.