Hadlee and former West Indies fast bowler Michael Holding have both suggested that Pietersen gained an unfair advantage by effectively changing from a right-hander to a left-hander, The Telegraph newspaper reported in Britain.
Hadlee endorsed the plans of the MCC (Marylebone Cricket Club), the guardians of the laws of cricket, to discuss the matter after the International Cricket Council raised concerns about it.
On Sunday, Pietersen used the stroke to hit two sixes off Scott Styris.
"It has created some serious issues in regards to the spirit of the game because the fielding side are dealing with a right-handed player and set the field accordingly," Hadlee said.
"The batsman has then changed that.
"If he is hit on the pad is he going to be treated as a left-hander or a right-hander?"
He also told The Telegraph that there were technical issues with the game's rules, such as which of the batsman's stumps should be treated as his off stump and his leg stump.
"Bowlers have to say which hand they are bowling with, so I don't see why batsmen should be allowed to change from right-handers to left-handers at a whim," Holding said.
