A method for authenticating a user to a document escrow service includes steps of logging a mobile phone onto a mobile network, wherein the mobile phone has a biometric sensor, a display, an input apparatus, and a non-transient memory in communication with a processor, and opening a signature application on the mobile device. The method further includes reading the biometric sensor and sending, via the mobile network, biometric data collected from the reading of the biometric sensor to a document execution server or a manufacturer application server. The method further includes receiving, at the mobile phone a permission signal and, dependent upon the permission signal received, using the mobile device to either allow or not allow a web ready document to be signed and returned to the document execution server.