By default, Adfin can collect up to £5,000 per invoice via direct debit.
If an invoice imported from Xero or QuickBooks exceeds that limit, it lands in Adfin as a Draft rather than being scheduled, and you'll get an email letting you know it wasn't sent.
If you'd like a higher limit, get in touch via live chat (the Get Help button in the bottom left of the Adfin console). We'll ask a few quick questions before we can update it.