Factoring is a financial transaction whereby a business or individual sells its account receivable (a.k.a. invoices) to a third party (e.g. collection agencies) at a discounted price, for it to be exchange into immediate money to finance the business. It is often misused synonymously with invoice discounting. Factoring is the sale of receivables, whereas invoice discounting is borrowing where the receivable is used as collateral.
Some major financial institutions sell their outstanding accounts both pre-charge off and post-charge off rather than have them worked in-house or sent to third part agencies or law firms. One factor is the volume of accounts and another is that they can obtain working capital upfront rather than waiting for funds to be collected over time. The advantage of this move is the invoices will be turned into money that can be use for the benefit of the company. The downside is collection agencies are known for their aggressiveness, so telephone harassment is a possibility.
FDCPA (Fair Debt Collection Practices Act) only covers third party collections agencies not original creditors. However Federal Trade Commission has issued a Staff Opinion Letter which indicates that, even if a collection agency has purchase a debt, it is still covered under FDCPA as a third party debt collector. Hostile collections can stress out the customer and might think negatively about the company in which he/she original has debt. This might be harmful for future business opportunities.
Aside to collections agencies, there are other debt buyers in the market. There are law firms, third party collection agencies and even individual entrepreneurs. There are a lot of individuals or companies that buy debts from individuals to large companies.