The duration of the guarantee is a duration that can't be changed. It shouldn't be discontinued, ceased or prolonged by any cases. The assurance in the duration of the guarantee relies on laws or client's appointments. For the case that client doesn't have the appointment or the appointment is not clear, how to assure the duration of the guarantee is discussed for different situations. The maximum mortgage of guarantee has its own characters, the major problem is the transition from the duration of the guarantee to proceeding prescription.
