how do the record companies catch and sue people downloading illegal music from sharing softwares like Kazaa?

Question by Lil K: how do the record companies catch and sue people downloading illegal music from sharing softwares like Kazaa?
how do the record companies catch and sue people downloading illegal music from sharing softwares like Kazaa and torrents etc?

Best answer:

Answer by john n
They get internet usage information from Internet service providers.

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