Pay specific product by voucher alone.

[3dlayeredscenery]

 

Excuse my ignorance, but I am very new to prestashop and cannot find a solution for this.

I am looking for a function which enables me to "sell" Virtual products with a voucher without the need for a payment method. First I tried making a 100% discount voucher through cart rules, but when going to checkout a payment method is still required, however when I apply paypal as my payment method I receive the message: "payment failed due to amount zero", this results in not receiving the product download.

Is there any way in prestashop to apply this function or do I require a specific module for this?

Thanks in advance!
 

 

Edited August 17, 2019 by 3dlayeredscenery (see edit history)