An electronic signature comprises an authenticated audio and/or visual recording of a spoken assent that conforms to a pre-established phrase. Alternatively, an electronic signature comprises an authenticated visual recording of a series of physical gestures that conforms to a pre-established sequence. Rules are established with respect to how the assent is to be recorded and authenticated. These rules, as well as the document itself, are provided to a document recipient. If the document recipient assents to the document, an audio and/or visual recording of the assent is generated. Location information that defines or approximates the geographical location where the document recipient recorded the assent is also optionally recorded as well. Once recorded, the assent can be authenticated using any of a variety of suitable authentication processes. An authenticated assent can be considered a legally binding electronic signature that forms a part of, or is otherwise associated with, the document.