A method for combining in zip code order pre-personalized printed items with items that are not pre-personalized. The method includes the step of producing a grouping of the pre-personalized items in zip code order according to a first mailing list. The first mailing list is merged with a second mailing list associated with the items that are not pre-personalized to produce a master mailing list of a desired zip code order. The pre-personalized items and the items that are not pre-personalized are selectively fed to a conveyor in the desired zip code order. The items that are not pre-addressed are addressed and the zip code bundles are prepared according to the master mailing list.