Samantha Markle, 53, flew in to the UK with the aim of confronting the Duchess of Sussex over the ongoing family feud involving the treatment of their father Thomas who failed to attend her wedding to Prince Harry.
But she appeared to have been met with a wall of silence and was photographed in an embarrassing stand-off with a security guard on the private road leading to the palace in West London.
The American, who has multiple sclerosis, failed to hand over her handwritten note on Kensington Palace Gardens before buying royal merchandise including Prince Harry and Meghan masks.
Bizarre pictures show Samantha clutching a Harry mask that she bought from a souvenir shop nearby.
Samantha flew in two weeks after palace officials received a letter saying her behaviour would 'escalate' if they did not arrange a meeting with the Duchess, according to The Mirror.