A method comprising: receiving, by a client computing device associated with a signer from a client computing device associated with a sender, an electronic signature document, wherein the electronic signature document is received from the client computing device of the sender by the client computing device of the signer independently of an electronic signature service; installing a code module on the signer's client computing device, the code module received from the electronic signature service and configured to transmit the electronic signature document received by an email client of the signer's client computing device to the electronic signature service; in response to a first input received from the signer, transmitting, by the signer's client computing device, the received electronic signature document to the electronic signature service for storage in the electronic signature service; accessing, by the signer's client computing device, the electronic signature document stored in the electronic signature service, wherein accessing the electronic signature document includes signing the stored electronic signature document in response to a second input from the signer; and causing, by the signer's client computing device, the electronic signature service to transmit an email attached with a copy of the stored electronic signature document to the client computing device of the sender using the code module, further comprising using a Web browser executing on the signer's client computing device to access the electronic signature document stored at the remote electronic signature service and adapted to cause the electronic signature of the signer to be stored in association with the electronic signature document, further comprising causing the remote electronic signature service to provide the stored electronic signature document to a recipient, wherein causing the remote electronic signature service to provide the stored electronic signature document to a recipient includes transmitting from the remote electronic signature service to the recipient an email including an identifier of the stored electronic signature document, the identifier configured to facilitate access to the stored electronic signature document at the remote electronic signature service. receiving, by a client computing device associated with a signer from a client computing device associated with a sender, an electronic signature document, wherein the electronic signature document is received from the client computing device of the sender by the client computing device of the signer independently of an electronic signature service; installing a code module on the signer's client computing device, the code module received from the electronic signature service and configured to transmit the electronic signature document received by an email client of the signer's client computing device to the electronic signature service; in response to a first input received from the signer, transmitting, by the signer's client computing device, the received electronic signature document to the electronic signature service for storage in the electronic signature service; accessing, by the signer's client computing device, the electronic signature document stored in the electronic signature service, wherein accessing the electronic signature document includes signing the stored electronic signature document in response to a second input from the signer; and causing, by the signer's client computing device, the electronic signature service to transmit an email attached with a copy of the stored electronic signature document to the client computing device of the sender using the code module, further comprising using a Web browser executing on the signer's client computing device to access the electronic signature document stored at the remote electronic signature service and adapted to cause the electronic signature of the signer to be stored in association with the electronic signature document, further comprising causing the remote electronic signature service to provide the stored electronic signature document to a recipient, wherein causing the remote electronic signature service to provide the stored electronic signature document to a recipient includes transmitting from the remote electronic signature service to the recipient an email including an identifier of the stored electronic signature document, the identifier configured to facilitate access to the stored electronic signature document at the remote electronic signature service.