ALBANY, N.Y. — A New York law is credited with removing 24,000 sex offenders from Internet social networking sites nationwide.

The law proposed by then-Attorney General Andrew Cuomo requires sex offenders registered with the state to provide all their screen names and e-mail addresses, with regular updates. The information is sent to two dozen social networking sites which then block the offenders.

Cuomo, now governor, says the law passed by the Legislature in 2008 is one of the most effective means to protect children from sex offenders in the nation.

The law’s third anniversary is Thursday.