Collection Harassment and Abuse
Information about debt collection and the Fair Debt Collection Practices Act (FDCPA), published by the Federal Trade Commission.
Wikipedia page regarding the Fair Debt Collection Practices Act (FDCPA).
Article about the 2013 Federal Trade Commission report on the debt buying industry, published by Consumerist.com. (Among other interesting facts: the FTC reported that debt buyers pay about 4 cents on the dollar to purchase consumer debt.)