Mortgage Bank is a company, individual or an institution that generates mortgages. Mortgage bankers use their unique funds, or funds borrowed from the warehouse lender, to fund mortgages. A mortgage bank is a bank that concentrates on originating and/or servicing mortgages. Generally, a mortgage bank originates credit and places it on the pre-established warehouse personal line of credit until the loan could be sold to an investor. Mortgage bank can vary in size and these company are operates worldwide.