Techniques allow for automatic signing of a digital document in response to some event and/or when the document satisfies some predefined condition. The document may be, for example, an agreement, a technical paper for publication, a press release or marketing materials, or any other digital document that might need to be assented to, approved by, and/or attributed to one or more persons or representatives. The techniques may further provide support for automatic signature tracking and notification in order to assist with auditability. In one example embodiment, the techniques are implemented in the context of an e-signature application or service, which may be installed locally on the user's computer or provided to the user via a network from a server. In one example embodiment, the e-signature service is configured to automatically impress a signer's signature into a given document, if the signer's pre-established auto-sign criteria is met.