Sell free products

[lucazani]

How can I make sure that I can sell something completely free online for the customer?

[maxter]

I do not get your question. What does it mean "sell completely free"? Are you planning to sell or provide for free?

Set product of price 0 to be free.

[abantecart]

Are you planning to have all products to be free? Are you looking for catalog mode with free downloads?
You certainly, can do this with AbanteCart.
Downloads can be added to the product with prior to purchase availability
See this manual.
https://abantecart.atlassian.net/wiki/spaces/AD/pages/10551300/Global+Digital+files.

[lucazani]

I Mead Provide for free