How do you remove sharpie stains from leather?

Do not use bleach or oxyclean as they will weaken your leather permanently, might even destroy it. (ever splash a little bleach on clothing and find a hole a few washings later?). Oil will add another serious problem and not fix a thing.

Sharpie is a big challenge, even for the professionals because usually it soaks deeply into the leather. There is no way to remove it from the deeper layers because the chemicals with that power will harm the leather.

Leather is a porous, dense mat of fibers. Inks soak in fast, then slowly spread in every direction..forever. This means that even if you get the surface clean, or cover with an opaque color coating, if there's any ink deeper, it will show up again and cover a larger area, but lighter.

If you have unprotected leather, with a matte or dull look and a buttery feel, or if the area was worn or cracked, exposing the leather itself to the ink, DO NOT try to remove it.

IF the leather has an opaque semigloss protective coating, like a paint - which most leather furniture does - and IF the Sharpie mark is VERY fresh and you are very quick, then you can VERY gently blot just the mark (use a q-tip) with rubbing alcohol or denatured alcohol. BLOT, do not rub. Alcohol dissolves sharpie ink, but is also a solvent for the leather color and can strip it bare - so be quick and gentle. You will remove some of the clear top coating and maybe the color layer, too, if the clear part has worn off. So, IF you're careful, you may be able to remove a very light mark, or lighten it to be less obvious.

If this doesn't work, you can try recoloring (DIY or call a professional) If the leather's a darker color, the ink may not bleed through enough to notice. The other option is to replace the entire affected section of leather.

If you have bonded or bi-cast leather, don't even try - these are plastic, not leather.