Chelsea and Brazil star Willian is set to take legal action after a fraudulent letter offering his services to European clubs was "circulating through the football market".
The 29-year-old posted a copy of the letter via his official Instagram account, partnered with a lengthy caption to explain the recent events, while also stating how he and his legal team plan to act as a result.
He said: "In the recent days I have been informed that a 'letter of authorisation for player agent FIFA', allegedly signed in my name has been circulated through the football market.