forgery

The making of a false document, painting, or object with deliberate intention to deceive or defraud. The most common forgeries involve financial instruments such as cheques or credit-card transactions or money (counterfeiting). There are also literary forgeries, forged coins, and forged antiques.

Financial gain is not the only motive for forgery. Han van Meegeren probably began painting in the style of Vermeer to make fools of the critics, but found such a ready market for his creations that he became a rich man before he was forced to confess. The archaeological Piltdown Man hoax in England in 1912 also appears to have been a practical joke.

forgery

In computing, the art of falsifying either the contents or the origins of a message. On the Internet, where a person's identity is shaped by his/her words as sent out via e-mail or public conferencing systems, sending out a forged message in another person's name can seriously damage them.