To renew your bus pass in Staffordshire Moorlands, you will need to go through Staffordshire County Council, as they handle all bus pass applications. Unfortunately, there isn't a detailed list of specific documents required for renewal provided in the available council records.
I recommend checking directly with Staffordshire County Council or visiting their website for the most accurate and up-to-date information regarding the renewal process. If you need further assistance, you can find more details on their Bus Passes page.