1. A computer-implemented method for determining a set of legal documents to present to a user for acceptance as part of a transaction, the method comprising: receiving, using one or more computing systems, informational data describing a transaction; identifying, using the one or more computing systems, a set of hierarchical electronic documents pertinent to the transaction based at least in part on the received informational data, the set including a root electronic document and one or more dependency electronic documents of the root electronic document, the root electronic document specifying a transaction identifier of the transaction and metadata identifying the one or more dependency electronic documents; selecting, using the one or more computing systems, a subset of electronic documents from the set of hierarchical electronic documents based at least in part on data describing electronic documents that a user involved in the transaction has previously accepted; identifying, using the one or more computing systems, from the selected subset of electronic documents, a current version of an electronic document that has not been accepted by the user; determining, using the one or more computing systems, whether acceptance of the current version is not required responsive to the user having accepted a prior version of the electronic document; responsive to determining that acceptance of the current version is not required and that the user has accepted the prior version, removing, using the one or more computing systems, the current version of the electronic document from the selected subset of electronic documents; and outputting, using the one or more computing systems, informational data pertaining to the selected subset of electronic documents for presenting the selected subset of electronic documents to the user involved in the transaction for acceptance as part of the transaction.