The short answer: Because it doesn't exist. As noted in the last post, a public record in Arizona is any record that can help the public keep track of the activities of a public agency. This means that the record must contain the kind of information that helps the public agency perform its mission or transact its business. If a particular document would not be of any use to the agency, then the document is not required to be created or kept. Nothing in Arizona's public records law requires that a public agency create a particular record simply because a person has asked for it, even if the contents of that record would be information collected from other public records. Thus, unless a public agency has some need for a list of public union membership dues withholdings, it does not have to create one just to satisfy a public record request.