The Colombian striker had never played in the top flight of his homeland but has sealed an emotional transfer to Millionarios.
Although he started out with Lanceros Boyaca, he was a mere 13 years old when making his debut for them, in the second tier, in 1999. Two years later, he joined River Plate and made a name for himself in Argentina, forging a reputation as a formidable centre-forward.
Via Porto, Atletico Madrid and Monaco, he ended up at United in 2014, signing in a season-long loan deal.
Falcao was popular with supporters and scored four times in 29 appearances in total, in games against Everton, Aston Villa, Stoke City and Leicester City for Louis van Gaal's side.