Het pied markers, might be true, but there is also het pied that don't have those markers and normals who have them. So the only way is to trust the breeder.

I sent you a Private Message about it.

But for everyone here, ScaleToTails (the breeder of that het pied, as it's suppose) have been in the business for some time. May be not with Ball but with other snake at least.

Good Luck !