Do I have to pay when a seller sends invoice ???

[BBnod]

 Do I have to pay when a seller sends me an invoice?? I made a mistake when ordering something and the seller said they will send me an invoice so I can complete the order. This is my first time using this type of thing and I don't want the item that the seller is selling me. Can I just not pay the seller when I get the invoice notification or Do I have to pay him. 

[kernowlass]

@BBnod

Just tell him you have changed your mind or don't pay the invoice, no one can force you to buy something.

[BBnod]

Thank you so much for your help