A 2700 will probably never, ever, lose to a 1300....
It will take an absolutely stupid blunder that the 1300 sees to win for the 1300. I am a 1700 or so, and can beat 1300 rated players on longer time controls with a knight or bishop down a lot of the time, so I cannot see how a 2700 playing as well as he can will ever lose to a 1300.
A time forfeit means a flag drop, right? Can not the other player resign and say he doesn't want the win under the circumstances?