You can purchase credits as often as you need. This could be daily, weekly or monthly. There is a facility for a minimum threshold within the system which can be set by you. Once this threshold is reached an email will be sent to the Finance User and the system will notify certification users by turning the welcome writing red (appears in the top left of the screen). This will remind you to purchase credits. If you do run out of credits the system will default to pay as you go until you top up with more credits.
Posted in: 6. Central Payment System (CPS) (FAQ)