The High Court has granted an injunction that will be served via Twitter.
The injunction was granted to self-styled Thatcherite blogger Donal Blaney. It calls for a person who is allegedly impersonating Blaney on Twitter to stop, and reveal their identity.
The Guardian wrote that this could be the beginning of the end for the traditional serving of court papers. The BBC said the injunction would be effective from 1930 BST.