In most cases, Curses and Hexes get their manifestation power not only using magic, but through the universal Law of Justice, Law of Balance, Law of Attraction and Law of Harmony. Depending on your specifications and the selection of spell, a curse or hex will be actively present in the life of whom ever we cast it on.
In addition to using magic and a variety of universal laws, Curses and Hexes consider all values of karmic debt in the application of most, if not all, of these spells. That is to say, when the curse or hex has become active in the individual’s life, they will be offered opportunities to learn their lesson in order to pay off any bad karma. However, in rare cases, the curse or hex can last a very long time as some individuals are just not capable of accepting responsibility for harmful actions or words.
This is yet another aspect of the universal laws at work through Curses and Hexes and demonstrates the fact that these spells do not interfere with free will, they only hasten the due payment of past, present and future bad karma through the definition of the hex or curse.