In a method for the control of a fast dynamic scale a first operating mode controls the transport device for transport of postal matter to a further processing station, a measurement with a weighing cell during the transport is made and an evaluation of the measured values with the letter format microprocessor for the weight determination given dynamic weighing, and weighed values are supplied to the further processing station. An automatic switching into a second operating mode for the semi-dynamic operation of the scale with static weighing ensues dependent on the result of a determination of the dimensions of the following piece of mail in a first processing station arranged upstream in the mail stream.