An approach for processing scanned document data includes a document merging network service receiving a request for existing electronic document data. In response, the document merging network service identifies and providing, to a scanning device, identification data that identifies existing electronic document data. The existing electronic document data may be stored by a third party storage service. In response to user selection of an existing electronic document identified in the identification data, the scanning device transmits, to the document merging network service, scanned document data, data that identifies an existing electronic document, and location insertion data. The document merging network service merges the scanned document data at one or more locations in the existing electronic document based on the location insertion data.