Peter Ridsdale has revealed Birmingham co-owner David Sullivan is not interested in investing in Cardiff.
Recent reports indicated Sullivan was preparing to put money into his hometown club once Carson Yeung's St Andrew's takeover has been completed.
Sullivan is understood to want an immediate return to the game after the deal goes through - with Cardiff and West Ham rumoured to be possible suitors.
The Bluebirds, currently flying high at the top end of the Coca-Cola Championship, would certainly welcome the added investment to ease some of their debt.
But having spoken to Sullivan's advisors, Cardiff chairman Ridsdale told BBC Sport: "I asked someone who is close to David Sullivan to speak to him. I was told the stories are not true and he had no interest in investing in Cardiff City Football Club.
"But if David, like any other interested party, wants to invest in Cardiff City then all he has to do is ring me up and talk to me.
"All I am is chairman and chief executive of a club that has a number of shareholders. And it is the shareholders that decide who owns the club over a period of time.
"Anyone that comes in with a big enough chequebook can be the next owner of Cardiff City Football Club - but clearly it would have to be at the right price."
Ridsdale will return to Malaysia tomorrow to continue talks with Far East magnate Dato Chan Tien Ghee over possible investment.
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