Last year alone, 2.9 million foreign visitors on temporary visas like Mr. Smadi’s checked in to the country but never officially checked out, immigration officials said. While officials say they have no way to confirm it, they suspect that several hundred thousand of them overstayed their visas.
Over all, the officials said, about 40 percent of the estimated 11 million illegal immigrants in the United States came on legal visas and overstayed.Since the Sept. 11 attacks, immigration authorities, with more than $1 billion from Congress, have greatly improved and expanded their systems to monitor foreigners when they arrive. But despite several Congressional authorizations, there are no biometric inspections or a systematic follow-up to confirm that foreign visitors have departed.
Last year, official figures show, 39 million foreign travelers were admitted on temporary visas like Mr. Smadi’s. Based on the paper stubs, homeland security officials said, they confirmed the departure of 92.5 percent of them. Most of the remaining visitors did depart, officials said, but failed to check out because they did not know how to do so. But more than 200,000 of them are believed to have overstayed intentionally.