8. An Electronic Service System (ESS) computing device comprising: a processor; and memory coupled to the processor and storing instructions that, when executed by the processor, cause the ESS computing device to perform operations comprising: accessing an electronic document uploaded to the ESS computing device by a first client computing device of a first user; accessing a set of custody rules associated with the electronic document, the set of custody rules controlling access to the document by a plurality of users including the first user and a second user of a second client computing device, the set of custody rules including a custody rule transferring an access right from the first user to a second user of the plurality of users based on occurrence of at least one event; processing a transaction associated with the electronic document and involving a third client computing device of a third user of the plurality of users; detecting, based at least in part on evaluation of operations performed by the third client computing device in reference to the transaction, an occurrence of the at least one event; and in response to the occurrence of the at least one event, transferring custody of the electronic document from the first user to the second user in accordance with the access right, and denying the first user access, via the first client computing device, to the electronic document governed by the access right while granting the second user access, via the second client computing device, to the electronic document governed by the access right.
8. An Electronic Service System (ESS) computing device comprising: a processor; and memory coupled to the processor and storing instructions that, when executed by the processor, cause the ESS computing device to perform operations comprising: accessing an electronic document uploaded to the ESS computing device by a first client computing device of a first user; accessing a set of custody rules associated with the electronic document, the set of custody rules controlling access to the document by a plurality of users including the first user and a second user of a second client computing device, the set of custody rules including a custody rule transferring an access right from the first user to a second user of the plurality of users based on occurrence of at least one event; processing a transaction associated with the electronic document and involving a third client computing device of a third user of the plurality of users; detecting, based at least in part on evaluation of operations performed by the third client computing device in reference to the transaction, an occurrence of the at least one event; and in response to the occurrence of the at least one event, transferring custody of the electronic document from the first user to the second user in accordance with the access right, and denying the first user access, via the first client computing device, to the electronic document governed by the access right while granting the second user access, via the second client computing device, to the electronic document governed by the access right. 12. The computing system of claim 8 , wherein after the transferring custody of the electronic document from the first user to the second user, the first user is to retain a second access right to view the electronic document and to view a data structure comprising information corresponding to the signature of the electronic document.