Bolt, winner of nine-Olympic gold medals, has been in discussions with Dortmund and plans are in place to spend time training with the Thomas Tuchel coached side.
The 30-year-old is expected to hang up his track spikes next year and told the Guardian newspaper he has "been genuinely talking to people" about the posibilites of becoming a professional football player.
A die-hard Manchester United fan, Bolt said he would love to one day pull on the club's famous red shirt.
"For me, if i could get to play for Manchester United, that would be like a dream come true. Yes, that would be epic," he said.
Last year Bolt joked that he was hopeful of recieving a call up to join the Old Trafford side.
"In my mind, I think I should do a trial and see if they would say 'Alright, come on in' or if they would say 'No, your're not any good.' I think I would be pretty good because I am fit, I am quick, I can control the ball and I understand all of the play.
"So, I think if I do a trial then they would say, ' You know what, here is a contract for five years! You are 30 years old, here's a five year contract. Let's just do it!'"