A system for creating a plurality of client mailers for a plurality of clients of a communication service provider having an account database storing client account data related to one or more services provided by the communication service provider to each client during a billing cycle includes first and second assembly modules. The first assembly module is operable to receive common data and variable data. The common data comprises data to be included in each client mailer, and the variable data is used for selecting client account data specific to each client for inclusion into the client mailer. The first assembly module is further operable to generate advisement data based on the client account data specific to the client and the variable data and store the common data, the selected client account data, and the advisement data in a mailer template file. The second assembly module is operable to access the mailer template file and for each client and create corresponding client mailer data comprising the common data, the selected client account data specific to the client, and the advisement data and store the corresponding client mailer data for each client in a mailer file.