Fiat
A shortly-worded court order.
Fiduciary
A legal duty of loyalty and faithfulness towards 
another.
Fieri Facias
A write of fieri facias commands a sheriff to 
take and sell enough property from the person who lost the lawsuit in order to 
pay the amount owed by the judgment.
Fifth Amendment
An article of the U.S. Constitution which provides fundamental rights in regards 
to due process. For example, when a suspect is read his Miranda Rights he is 
told he has to right to remain silent, this would be pleading the fifth.
Fiqh
Also spelled fikh, it is the law of Islam.
First Amendment
The amendment to the U.S. Constitution which sets out freedom of speech, right 
to petition, free practice of religion, freedom of assembly, and freedom of the 
press; continues to be the subject of court cases on both the State and Federal 
level 
Force
1)  generally indicates a level of real or 
perceived violence; to break-through; to impose 2)strength; power
Force Majuere
French for an act of God; an inevitable, 
unpredictable act of nature.
Foreclosure
To eliminate a right of redemption on mortgaged 
real property.
Forfeiture
The seizure of private property because it was illegally obtained, is an illegal 
substance, or the legal basis for possession has ended.