The present invention provides apparatus for stacking media items, comprising a base member for supporting a stack of media items, at least one first registration member extending generally upwardly with respect to the base member, and at least one further registration member extending generally upwardly with respect to the base member and spaced apart from the first registration member, wherein at least a one of the first and further registration members is selectively moveable towards or away from a remainder one of the first and further registration members in an input direction of the media items. A method of stacking media items is also provided.