I found an old test installation of the Stripe plugin, where I had set up one product to sell. It did not have the full range of ‘friction’ settings to stop such abuse: reCaptcha enabled, required fields for credit card CVV and postcode, etc. That was the product that the card testers were using but it took me a while to remember I had this test installation on another web site. Once I deleted the product, the card testing stopped immediately. Hope this is of some help.
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This reply was modified 3 years, 1 month ago by tomc.