A system for processing value documents, in particular bank notes, wherein the system comprises: at least one bank-note processing machine having a central control device on which there are implemented software modules which are necessary for the standard operation of the bank-note processing machine ; and an application server which is connected to the bank-note processing machine via a communication network and on which there is implemented at least one further software module with optional applications which is executed on the application server and provides to the bank-note processing machine an application which provides at least one function going beyond the standard operation of the bank-note processing machine, wherein the bank-note processing machine comprises at least one checking device which captures raw data and/or measuring data of the bank notes processed with the bank-note processing machine , wherein the software module implemented on the application server provides an application which is arranged for processing the raw data and/or measuring data captured by the checking device of the bank-note processing machine , characterized in that the raw data and/or measuring data provided by the checking device of the bank-note processing machine comprise serial-number data of the bank notes processed by the bank-note processing machine , wherein the application server is arranged, due to a serial-number application executed thereon, for storing in a serial-number archive the serial-number data provided by a bank-note processing machine , and supervising the flow of bank notes between the bank-note processing machines that are in communication with the application server , using the serial-number data provided by a bank-note processing machine as well as using the serial-number archive. at least one bank-note processing machine having a central control device on which there are implemented software modules which are necessary for the standard operation of the bank-note processing machine ; and an application server which is connected to the bank-note processing machine via a communication network and on which there is implemented at least one further software module with optional applications which is executed on the application server and provides to the bank-note processing machine an application which provides at least one function going beyond the standard operation of the bank-note processing machine, wherein the bank-note processing machine comprises at least one checking device which captures raw data and/or measuring data of the bank notes processed with the bank-note processing machine , wherein the software module implemented on the application server provides an application which is arranged for processing the raw data and/or measuring data captured by the checking device of the bank-note processing machine , characterized in that the raw data and/or measuring data provided by the checking device of the bank-note processing machine comprise serial-number data of the bank notes processed by the bank-note processing machine , wherein the application server is arranged, due to a serial-number application executed thereon, for storing in a serial-number archive the serial-number data provided by a bank-note processing machine , and supervising the flow of bank notes between the bank-note processing machines that are in communication with the application server , using the serial-number data provided by a bank-note processing machine as well as using the serial-number archive. <EOS>