identity theft

One of the best sources for people interested in "borrowing" someone's identity for a short period of time might just be the government:

Dozens of law enforcement Web pages list names, addresses, dates of birth, Social Security numbers, heights and weights — everything an identity thief needs to impersonate a victim. Sometimes there’s even a photo. The dossiers belong to prison inmates and wanted criminals; the sites that list them have become user-friendly shopping malls for identity thieves.

Records regarding bankruptcies may also be available online, and may include social security numbers.