Systems and methods are disclosed for establishing a video connection between a client device and a notary support terminal while enabling the client device and notary support terminal to notarize a digital document. In particular, the client device can display multiple panes simultaneously, the multiple panes including a first pane that displays the video chat and a second pane that displays at least one notarization interface for notarizing the digital document. While the client device displays the multiple panes and during the video chat, the disclosed systems can notarize the digital document by authenticating the user of the client device, collecting signatures from the user of the client device and the notary associated with the notary support terminal, and applying an electronic notary seal to the digital document.