If an online sale is $0, as a result of a coupon code, is there a transaction fee? How much?

[Torrey]

If an online sale is $0, as a result of a coupon code...
(1) Does it still require details for payment?
(2) Is there a transaction fee?
(3) If so, how much?

[nika]

Hey @Torrey- 

1. You can choose to add as much or as little information regarding the payment and the customer as you'd like. I'm not sure what details you're referring to, specifically. 

2. There's not a transaction fee is the total is $0.00.