Another charity that interweaves charity and mystery is Art on a Postcard. Raising money for The Hepatitis C Trust via secret postcard auctions, sales of prints and postcard boxsets, the charity aims to;
In 2017, the organisation ntroduced Photography on a Postcard and Art on a Ukulele. Artists who have taken part include Sir Peter Blake, Damien Hirst, Harland Miller, Gavin Turk, Rachel Howard, Gilbert and George, Grayson Perry RA, Norman Ackroyd RA, Allen Jones RA, Mick Rooney RA, Polly Morgan, John Wragg RA, Stephen Chambers RA, Michael Craig-Martin, Chantal Joffe RA, Cecily Brown, Martin Yeoman, Grayson Perry, Julian Opie and Jeremy Deller.