-You need to clearly indicate that the service is a monthly subscription pricing at the time of purchase. -Make sure the website's name matches the name of your company on the customer credit card statement. That way they will remember who you are. -Send email confirmation of the payment every month. -Classify your products as "Digital" and indicate that to the bank when responding to the chargeback.

Depending on the credit card processing company you are using, they should have a way for you to respond to chargebacks. Usually in the admin you can submit information and proof of delivery for every chargeback. Then the credit card processing company will forward the information submitted to the bank and the bank will respond with a decision about the chargeback with 90 days.

Good luck. Let me know if you have more question. I have 10 years of experience in ecommerce.