Magic Forums

I have heard from several people state that any sort of spell you cast will cost you something, for example:
if someone were to cast a money spell they would get the money, but the money would come from the will of a close family member who dies.

Or

if someone were to cast a love spell on someone, that person would fall in love, but the person who cast the spell would lose the other to tragedy?

Has anyone experienced this? Or does this only fall under a certain type of magic?