@Mich_S 
1. Instructions at Learn how to delete your customers' credit card information from QuickBooks Payments Do Not Work, as many in this and related threads have mentioned. Please stop suggesting options you guys have not tested yourself, it is tiring and disrespectful of our time.
2. Submitting a suggestion without any receipt confirmation or confirmation email that the suggestion has been received and entered for review, feels pointless, disappointing, and disempowering, so no, I'll not be submitting any suggestions as your platform certainly is designed in the way that discourages using this feature....