Chartomancy is the art of divination by interpreting inscriptions written on paper or cards.
Derived from the Latin charta ('a paper') and the Greek manteia ('divination'),
Chartomancy is an ancient system of divination that draws omens by interpreting the writings in literary or musical works, official papers, letters, manuscripts, documents, and so forth. Inscriptions, are sometimes of mysterious origin. Predictions written in invisible ink, which appears when papers are heated, come in this general category.
choosing Valentines refers to an old French custom of choosing valentines by writing names of a group of males and females on pieces of paper and selecting them at random.