"It might have nothing to do with the two clubs directly, it could be between two agents, so how can you relate that [back] to the football clubs? You can't, so it can all get done that way."
Allardyce added: "If he is not going to sign a contract [here], I [would] find it highly unlikely if it is not already verbally done."
"Are other managers getting calls from his agent? You said that, not me," the BBC reported Allardyce saying.
"You have to accept the way it is and contrary to whether it breaks the rules or it doesn't, it happens.
"You are not going to prove it anyway. It is just one of the ways the football world works."
The manager insists West Ham have put "a million offers" to Reid over the past year, but there has been no progress in persuading him to sign a new deal.
"There is no future for Winston Reid at West Ham United at the moment because his contract finishes on June 30," Allardyce said. "So I would say it is highly unlikely that Winston is going to sign for us based on what people are saying to me."
