A fieri facias, usually abbreviated fi. fa. is a writ of execution after judgment obtained in a legal action for debt or damages for the sheriff to levy on goods of the judgment debtor.A writ of execution (also known as an execution) is a court order granted to put in force a judgment of possession obtained by a plaintiff from a court.[1] When issuing a writ of execution, a court typically will order a sheriff or other similar official to take possession of property owned by a judgment debtor.