Fraud

Deceitful conduct designed to manipulate another person to give something of value by (1) lying, (2) by repeating something that is or ought to have been known by the fraudulent party as false or suspect or (3) by concealing a fact from the other party which may have saved that party from being cheated. The existence of fraud will cause a court to void a contract and can give rise to criminal liability. (Duhaime's Law Dictionary: http://www.duhaime.org/dict-f.htm#F)

Mens rea

Latin for "guilty mind." Many serious crimes require the proof of "mens rea" before a person can be convicted. In other words, the prosecution must prove not only that the accused committed the offence but that he (or she) did it knowing that it was prohibited; that their act (or omission) was done with an intent to commit a crime. (Duhaime's Law Dictionary: http://www.duhaime.org/dict-m.htm)