Technical considerations aside it's still good practice to make it easier for customers to cancel. It makes them feel more comfortable signing up. Joel wrote

Technical considerations aside it's still good practice to make it easier for customers to cancel. It makes them feel more comfortable signing up. Joel wrote a few great articles on it: http://www.joelonsoftware.com/items/2006/08/23.html http://www.joelonsoftware.com/items/2006/08/23.html