Abstract: A method of operating a personalized document processing system that is configured to process a plurality of personalized documents under a subscription plan is provided. The method includes a controller of the personalized document processing system receiving a subscription plan key code. The method also includes the controller verifying the subscription plan key code. Also, the method includes determining and setting a subscription threshold for a processing module of the personalized document processing system based on the subscription plan key code. The processing module is configured to perform a processing operation on one or more of the plurality of personalized documents. Further, the method includes tracking operation of the processing module to determine whether the subscription threshold has been reached. Moreover, the method includes adjusting operation of the processing module when the subscription threshold has been reached.