How do I change my direct debit ? 30 September 2022 00:19 Updated To change your existing direct debit you can fill in and submit a new online direct debit form or downloadable direct debit form. As a result of completing and submitting the form, the new instructions will overwrite your current direct debit set up. Related articles How do I cancel my direct debit? How is my direct debit amount calculated? When does my final direct debit payment need to be made? Why is my property not showing in your search results? What payment methods do you offer?