You are required to set a default debit/credit card and all your automatic Ablr payments will be deducted from that card by default. If there is only one card added in your Ablr account, it will be the set as the default card.
If the card used to make payment for the 1st instalment is different from the default card, the subsequent instalment payment will still be deducted from the set default card.
You will not be able to delete this card unless you have added another card as your default payment method. You’ll need to have at least one card set your default payment method in order to enjoy Ablr services where available.