Cameron and Stoke are now in discussions regarding personal terms with an international clearance still to be sorted.
"The deal is a work in progress as we speak," Potters chairman Peter Coates told the Stoke Sentinel.
"We are still talking on personal terms and we need to make sure we get international clearance for him.
"But we are hopeful we will get that clearance on the basis of his history, his background and his achievements to date.
"We can see no reason why we won't get that clearance, but obviously we are taking nothing for granted."