Payment method for free?

Hi!
I have question… can i sell product (access to download file) with price 0?
I set payment method with price from 0 to 0. When user buy product proccess is completed but payment status is WAITING FOR PAYMENT. I need set Current Date in Order Payment Information to change this status and have posibility to send orders files.

Is it the only one solution?

Solution was change in product option “Download is available only after purchase” to false.