the clearing firm is not the one doing it.the software vendor seperate from the clearing firm is allowing the trades to happen. he's not coding the illegal shorts as shorts many times but just sales.so every night they electronically send all the trades to be cleared so as long as there's no overnight no problem. i know somebody who has gotten in trouble for this. many times the sec comes back years later. for isntance you know many stocks like baudi inshortable. IF YOU CAN'T HOLD THE SHORT OVERNIGHT ITS A NAKED SHORT AND ILLEGA. DO AT YOUR OWN PERIL.
