Abstract: A fax document can be either uploaded to a fax server in a vPBX network or generated dynamically. For dynamic generation, pre-configured templates can be stored either on a mobile device or on a fax server. A user can use a mobile device connected to a vPBX network as a controlling device to direct generation of faxes on a fax server. The generation of faxes can be customized based on a geographic location of the mobile device. The generated fax can be downloaded onto a mobile device. The user can digitally sign the fax using a touch-screen input device on the mobile device. The digitally signed fax can be transmitted to a destination device.