McCoist promised fans he would get to the truth after former owner Whyte claimed Green was acting as his frontman when he bought the remnants of oldco Rangers out of liquidation.
Green has vowed to resist any legal bid from Whyte to force his way back into Ibrox, and after holding talks with the chief executive McCoist made no bones about where his allegiance lies.
The manager said: "We spoke and I'm glad we did. I never believed that Charles had entered into any kind of agreement but it was important to have a chat after what the former owner had been putting about in the papers.
"I am a fan and it would be devastating to have this man back anywhere near the club he almost destroyed."
Green said: "Along with all the Rangers fans Ally has lived through the brief but calamitous Whyte era and the very mention of this man's name is enough to have even the strongest of them concerned. But there is no need for any anxiety.
"Rangers FC, no part of it and none of the assets will ever fall into Whyte's hands. If I have to I will stand at the front door and deny him entry.
"I can guarantee every single fan that I will not let them down and that Whyte has no claim on any part of this great club.
"I have told Ally that and I have told him the truth of the matter, just as I have always done. He knows what we are doing."