If a direct debit is how you usually pay your account, you may want to update these details to pay the minimum payment or another higher amount regularly. Otherwise, the direct debit will carry on collecting the full amount which is outstanding on the account (including the balance transfer). The direct debit details would also need amending to reflect the change of card provider. However, if you are able to pay the account balance following a balance transfer, you wouldn’t need to set up the direct debit.