We use Stripe to process Direct Debits. As part of their policy, they send you two different emails:
1. Confirming setup of Direct Debit instruction, this tells you your Direct Debit has been set up and what details have been used. This is sent after initially setting up your repeat donation.
2. Debit initiated for Stripe 'RE GAYL-DON', this is a reminder that is sent 2 days before your payment is taken.