Like mentioned above, when you sign up with the service, you're giving the card info and then you're automatically enrolled in a 2 week trial that will automati

Like mentioned above, when you sign up with the service, you're giving the card info and then you're automatically enrolled in a 2 week trial that will automatically charge afterwords. This should suffice. I don't think they'll wait 2 weeks for the charge to go through. You can automate the process of disabling charges to if nothing happens. Say 2 days before the charge is about to happen, you do an automated audit of the account and if there hasn't been any activity, fire off an email stating that their trial is about to expire and they're about to get charged and you noticed they hadn't used the service yet. If still no activity when you're about to charge, then cancel charge and disable account and chalk it up as avoiding a chargeback. Make sure to email the user saying that you disabled the pro features and voided the charge as to not automatically charge them for something they're not using. It's a win/win situation. If the customer was legit, you just saved them on paying for something they didn't plan on using, and they may actually re-enable it and start using the account because they see you actually care about them as a customer and aren't just hoping they forget about such a small charge and it goes on for years before they audit their card charges and cancel any small things. If it's a user who was just testing stolen cards, well 2 weeks is a long time to gamble on if it's valid or not, so they move on.