For the first time tetravalent palladium is detected, coordinated exclusively by simple oxoanions. Stabilization was achieved by formation of the [Pd(S2O7)3]2- complex in which three chelating disulfate groups surround the metal atom. The salt K2[Pd(S2O7)3] could only be obtained if the reaction of K2[PdCl6] and neat SO3 was performed in the presence of XeF2.