Actually yes.

But there is a catch. The one who's supposed to die lives, but must serve Reathos until his new time of dead arrives. At that point, Reathos knows no mercy. Also, throught the service there will be several catches.

There also is no garantue that Reathos accepts any deal. This all goes for all demi-gods and other kind of immortals (with the exception of gods, with on that another exception if Fate demands it).