Systems and method for verifying a user signing a document are disclosed. In particular, certain disclosed embodiments relate to verifying that a user signing a document corresponds to a previously authenticated user, the user having been previously authenticated using a source of machine-readable identity data. The verifying may be made by receiving, from the source of machine-readable identity data, first digital image data indicative of a first image of the previously authenticated user and first identity data, and receiving from a camera, a captured second image comprising second digital image data that corresponds to the user. Responsive to the first image and the second image being determined to represent the same user, verification data is generated and associated with the document.