According to Citizens Advice it is the law that you can stop a card payment. They also say you can do this by email. It is not completely clear if you can put these two statements together and get that it is the law that you can stop a card payment by email:
The law says you can withdraw your consent and stop a future payment under a continuous payment authority at any time up to the end of business on the day before the payment is due.
To withdraw consent, simply tell whoever issued your card (the bank, building society or credit card company) that you don’t want the payment to be made. You can tell the card issuer by phone, email or letter.
Is it actually the law that you can do this by email? If so, practically how do you do this? From a sample of one, banks do not obviously provide an email address for this, and they are frequently not set up for validation by email.
