cancel subscription option for pay to blog

is there an easy way to set up a cancel subscription option such as you have for premium wpmudev?

I see a button link in my profile at wpmudev that I can click if I wanted to cancel my subscription.
That might be a nice feature to use with the pay to blog plugin. I have customers sometimes ask me how to cancel their subsriptions, some of them are not sure how to do this in paypal.

Thanks for any input.
Tony V