NEW YORK: With US unemployment at a 20-year high, some Americans are working for free while looking for a job, but experts are split over whether it is a sign of dedication or desperation.

Unpaid job seekers can keep their resumes fresh by boosting their experience and learning new skills, experts say, but others warn businesses may take advantage of the jobless and that it is illegal for commercial companies not to pay workers.

Dana Lin, 22, is one of the 14.7 million unemployed workers in the United States. She lost her marketing job at a technology company near San Francisco in April and since then has been working for free for about five hours a week for Internet company Jobnob.com.