Reportedly this may be another phone number used by an extortionist in a debt collector's cloak. The agents' horrid threats are empty and their conduct is illegal. As early as possible it's critical to determine if your collector is domestic or yet another South Asian faker. The former you can sue into submission; the latter tend to be out of reach.

My notes from October 2011 on payday loan and "hot check" collectors are linked below.
http://800notes.com/forum/ta-429fb24ec2162e3/ ... -numbers-here-2

See also this FTC alert: "Fake Debt Collectors"
http://www.consumer.ftc.gov/articles/0258-fake-debt-collectors

The following will be useful if you have a US domestic collector calling:

official FTC guidance and staff opinions on the FDCPA, PDF copy of the Act
http://www.ftc.gov/os/statutes/fdcpajump.shtm

CFPB Q&A on debt collection practices
http://www.consumerfinance.gov/askcfpb/search ... bt%20Collection