Magento Authorize.Net CIM extension provides you to store your payment information in Authorize.Net's secure servers like credit card details. Authorize.net CIM will provide Magento 'token' access to allow future transactions without the merchant storing any sensitive credit card data on their servers. Magento merchants who offer Authorize.Net as a payment gateway are allowing their customers to create customer accounts within Magento to facilitate a quicker checkout. The Authorize.Net CIM extension is a custom eCommerce payment solution to allow for stored billing data within the payment gateway rather than within the Magento platform. Authorize.net CIM Payment extension supports online transections like Authorize, Authorize and Capture,Credit Memo Online, refund, Partial Refund.