Scenario-

Ellie, who lives in Paris, emailed Memoona -an acquaintance who owns an art gallery in London- a picture of an old painting which was left to her by her grandmother, who also lived in London. Ellie is interested in selling the painting as soon as possible. Memoona thinks that it might be by Rembrandt but is not sure. Memoona offers £5,000 for the painting. Ellie, who will travel to London that week, sends a text message accepting Memoona’s offer, to be paid in exchange for the painting next week. The evening before the transaction occur, Ellie shows the painting to Herve, who is an art critic. He recognises the painting and assures this is a Rembrandt. It may be worth up to £500,000. The following day Ellie refuses to hand it over to Memoona for the agreed price.