This sucks and can often be a crippling blow for a small business if it's not caught early. I remember we used to deal with a lot of this at Twilio, except the

This sucks and can often be a crippling blow for a small business if it's not caught early. I remember we used to deal with a lot of this at Twilio, except the carders would then also try to cash out the credit card into Twilio credit. The pattern was try to spend $10 on a card, then one minute later try to spend $1000 once the first charge went through. But it's a lot less costly than toll fraud, which I learned the hard way working on our auth system at https://charge.co https://charge.co.