Answer:
MBF Leasing is a company that leases credit card processing equipment to business owners. Their business practices have been predatory and shady, which has led to numerous ripoff reports, angry small business owners, and even negative media coverage online. They also do business as Lease Finance Group, Northern Leasing, and other entities.
A very good summary of their business practices is kept here: http://www.merchantpointofsale.com/. And this page here is an excellent, step-by-step description of how MBF operates and victimizes small business owners across the country: http://www.merchantpointofsale.com/mbfscam/mbfscam.php.