good faith deposit
A sum of money required of an investor who is placing an order when that investor is not known to the brokerage firm. A good faith deposit ensures that the customer will follow through with proper payment for a buy order or with delivery of securities for a sell order.
A sum of money deposited by competing underwriters of a new municipal bond issue. The deposit is a relatively small proportion (usually under 5%) of the value of the issue being underwritten.