Free Payment Method for AJAX eShop is for shop owners and eCommerce developers who want to test the purchase process without using a real credit card. 
Free Payment Method is an implementation of VM Payment - AJAX eShop Standard, for AJAX eShop; allowing stores to sell and process free products, and also change their status to confirmed. 

Because testing store checkouts can take a lot of time and form completion, this is a very handy tool for any Virtuemart store.