With a melee touch attack you can dispel an Illusion or return a Creature to its natural form. You make one dispel check (1d20 + your caster level) and compare that to the spell with highest Caster Level (DC = 11 + the spell's caster level), receiving a +2 enhancement bonus on your dispel check. You can only dispel illusions or changes in form created by supernatural effects or spells. If multiple effects are changing the creature's appearance, you can dispel one such effect for every four caster levels you possess, starting with the highest Caster Level spells and proceeding to spells with lower caster levels. The Caster Level for Supernatural Abilities such as Change Shape is equal to the target creature's Hit Dice. A Creature returned to its natural form by banish Seeming is prevented from changing its form again for a number of rounds equal to your Caster Level.

Banish Seeming has no effect on nonmagical means of changing appearance, such as that provided by a Disguise or extraordinary ability.