20880302_ferences__July_2014_FIDE_Laws___FIDE_rule
[0] 4. [USCF rule] USCF rule 15A require the player to make the move first and only then record the move. However, a commonly used variation (often unannounced) allows a player using a paper scoresheet to write the move on the scoresheet before making the move on the board. [FIDE rule] 
You must make your move on the board first and only then record the move unless you are claiming a draw by triple occurrence of position or by the 50 move rule (or sealing a move).
The United States Chess Federation - USCF - FIDE Rule Differences (July 2014 FIDE Laws)
FIDE rule