Techniques for electronic signature processes are described. Some embodiments provide an electronic signature service (“ESS”) configured to facilitate the creation, storage, and management of electronic signature documents. In one embodiment, an electronic signature document may be associated with custody transfer rules that facilitate transfers of custody of an electronic signature document from one user or party to another. A custody transfer may results in a transfer of rights or capabilities to operate upon (e.g., modify, view, send, delete) an electronic signature document and/or its associated data. A custody transfer rule may be trigged by the occurrence of a particular event, such as the receipt of an electronic signature.