The "Saucy Jacky" postcard is the name given to a postcard received by the Central News Agency of London and postmarked 1 October 1888. The author of the postcard claims to have been the unidentified serial killer known as Jack the Ripper.
Because so many hoax letters were received by Scotland Yard, the press and others, it is unknown whether this was an authentic letter written by the Whitechapel murderer. The postcard did contain information deemed compelling enough to lead investigators to publish a facsimile of the communication in hopes that someone might recognise the handwriting.[1]