Once again you show your complete lack of understanding of how the market works.
I personally don't know of any certificate you can get for a shorted share, but you feel free to enlighten me.
Whenever an investor purchases a share that is the opposite side of a short selling trade the buyer of that share has a 100% legitmate share and all the rights that go with it. He can request a certificate for that share.
The owner of the "Borrowed" share no longer owns it but has the right to get a replacement share back in order to trade it himself or convert it to a certificate and the right to any dividends that may be assigned to the share.