I took out a free trial for some software that blocked online adverts. I tried to cancel directly with the ad-blocking service, but was told that my subscription had three parts and I would have to cancel each one individually. money expert, says…It appears that the company has been billing you via a continuous payment authority (CPA), which is a recurring card payment. You’ll know if it’s a CPA because you’re asked to give card details at the point of purchase, rather than bank details. Next year, new rules will come into effect that require businesses to notify you before each renewal of a subscription.