Take a black figure candle, carve the name pf person who is lying and any other info into the figure. Using a hot nail melt away the mouth. Smooth the mouth area over so you can't even tell there was a mouth there, then bind the mouth area with black thread.
Using a knife or nail hollow out a small hole in the area of the heart. Inside the hole sprinkle a little bit of graveyard dirt and (if you wish) a drop of your own blood. Again using the hot nail or hot knife remelt the wax over the hole until the contents are sealed in.
Light the candle for a few seconds as you name; the candle and tell it your wish (i.e. Joe Smith; will stop spreading lies about me) use your own words here.
Take the figure to a graveyard and hang it in a tree with a piece of black thread.
Buy a cows tongue at the grocery store, slice it open length wise (top and bottom) between halves place a piece of paper that you have written the person who is lying name on, be as detailed as you can. Roll the tongue up (tip to back) and drive 7 nails, 7 pins and 7 needles through the tongue each time saying something like "(name) cannot lie."
Wrap the tongue up in red cloth and leave it in the woods with 7 pennies.