1. A computer-implemented method for presenting status of digital signatures, the method comprising: receiving a digital document that defines a presentation structure and includes a digital signature, the digital document specifying a representation of the digital signature and a location in the presentation structure for the representation of the digital signature; determining a status for the digital signature; associating a status representation with the digital signature, the status representation identifying the status determined for the digital signature; without altering the representation of the digital signature, presenting at least a portion of the digital document and the status representation of the digital signature in a user interface, the status representation being presented in the presentation structure at a location that depends upon the location in the presentation structure for the representation of the digital signature; and presenting information in the user interface about the status determined for the digital signature in response to a user input, wherein the user input comprises an indication of a selection of the digital signature in the user interface.
14. The method of claim 1 , wherein the user input further comprises an indication of a selection of the status representation presented in the user interface.