Using Factoring to increase your immediate liquidity and cash reserved, is a well-known operation, but even so not all the business owners are using this tools, some due to lack of knowledge and some due to high interest which they have been paying so far when using this service.
Some are mistaken to think only big companies can do "Factoring" while in fact each company can use this tool and increase immediately their cash flows.
The ability to sell you future receivables (invoices) in return to immediate cash. The action is totally legal and is held in the financial sector for years.

The International Factoring Association’s (IFA)

EU Federation for the Factoring and Commercial Finance Industry (EUF)