The Premier League have reiterated that Lord Stevens should be informed if there is suspicion of a transfer not being above board.
He is due to release his findings on football corruption next month after an inquiry was ordered by the governing body.
However in the meantime the BBC Panorama programme is threatening to lift the lid off 'bungs'.
Premier League spokesman Dan Johnson countered: 'If anyone has any evidence of wrong doing in regard to alleged irregular payments in transfers, please hand over the evidence to Lord Stevens.
'He is conducting a very thorough and very serious inquiry into this matter.'
Portsmouth manager Harry Redknapp has insisted he has nothing to fear from any investigation.
Redknapp has admitted meeting a man masquerading as a German businessman and who was, in fact, part of the BBC's Panorama team working on a programme set to be screened next Monday.
'I spoke to this bloke for about five minutes, if that,' said Redknapp. 'He told me he had some world-class players he could bring to England and I said ''good luck to you mate.'
'We chatted while all the Portsmouth apprentices sat around and that was about it.
'He went away and I thought that was the end of it. Now I find I am at the centre of some big investigation, yet again.
'I haven't seen any evidence of anything and am not worried in the slightest. There is no evidence against me. I don't even know why my name has been dragged into all this.'