matter_billing_type "Code indicating how the matter is billed. Valid values and their descriptions are: CT - Contingency Fee - When the law firm's fee is based on a percentage of the amount recovered by the law firm client in a plaintiff's action. FF - Flat Fee - When the firm is paid a flat fee on the matter only. GW - Goodwill Work - Where the firm has performed services for free for the client on a matter and provides information on the work performed in a separate $0 invoice to the client. MPF - Multi-Payor Fees - When the cost of services provided on a matter is split by multiple clients of the firm regardless of any other matter_billing_type that may apply. TM - Time & Materials - When the bill is based on hours worked, or where there may be a combination of hourly billing plus a flat fee by task arrangement. A null value defaults to ""TM"". "