Many people claim to be able to do return to sender magic (for instance, someone curses you to lose your job, and they lose their job).
However, I am skeptical of many of these claims.
Are any of you familiar with instances where it is clear that “return to sender” magic has worked?
Also, how would you distinguish this from ordinary backlash during a successful working, for instance, you summon destructive forces and your plumbing explodes; or the demon you want appears and its friends just don’t want to leave?