This was actually a pretty good read on dealing with card fraud, though most of it will be familiar to anyone dealing with e-commerce. I hadn't considered that

This was actually a pretty good read on dealing with card fraud, though most of it will be familiar to anyone dealing with e-commerce. I hadn't considered that charities would be a target for card testers, but it makes sense. For related reading, there's the blog post of when Candy Japan was targeted by card testing fraudsters: https://www.candyjapan.com/behind-the-scenes/how-i-got-credit-card-fraud-somewhat-under-control https://www.candyjapan.com/behind-the-scenes/how-i-got-credi...