The 37-year-old keeper is said to have spoken to Bolton officials about his availability.
"I was talking with a person sent by Bolton from England, and the president of River Plate, Jose Maria Aguilar, was also there, but I don't have anything decided yet," the keeper was reported to have said.
Allardyce doesn't deny this, but has an explanation as to the reported conversation.
"He bumped into our Club secretary while on holiday and said that he was available if Bolton wanted him," the Wanderer's boss told the clubs official website..