I want to migrate from 1 shopping cart to Amember as my primary billing source and continue to use Auth.net. However, several of my customers are set up with recurring billing. How can I make the transition seamless without double billing customers within the same billing cycle?
There is no way to do this without user's attention as far as I know. I don't think that 1SC will allow to export user's with CC info but both AIM and CIM plugin will require signup from aMember (so CC info on import will be required) So you can import users into aMember and set correct expiration dates for user's payments (should be set to next rebilling date) then ask your users to Update CC info from member's area.