Ferrari have accepted the FIA's clarification over Sebastian Vettel's overtake on Jean-Eric Vergne in the Brazilian Grand Prix, clearing the Red Bull driver to retain his world championship crown.
The team had asked the FIA for clarification into the overtake, where Vettel seemed to pass the Toro Rosso driver with yellow flags displayed.
The governing body said that a green flag was flying and "as the overtaking manoeuvre was not in breach of the regulations, and therefore there was no infringement to investigate, it was not reported to the Stewards by Race Control."
Ferrari said it now felt the matter was closed and that they had only made the request in response to internet queries from supporters.
"The request for a clarification from the FIA, regarding Vettel's passing move on Vergne, came about through the need to shed light on the circumstances of the move, which came out on the internet only a few days after the race," the team said.
"The letter to the FIA was in no way intended to undermine the legality of the race result.
"We received tens of thousands of queries relating to this matter from all over the world and it was incumbent on us to take the matter further, asking the Federation to look into an incident that could have cast a shadow over the championship in the eyes of all Formula 1 enthusiasts, not just Ferrari fans.
"Ferrari duly takes note of the reply sent by the FIA this morning and therefore considers the matter now closed."
Red Bull welcomed the decision of the FIA, and of rivals Ferrari's dropping of the case.
We are pleased, but not surprised, that the FIA has confirmed there is no case to answer regarding the 2012 Brazilian Grand Prix," the statement read.
"We are extremely proud of Sebastian's incredible achievement and his third historic title, which makes him the youngest ever triple world champion."