I am wanting to add a voucher to the end of my feedback form to thank the participants for completing the form

Hi there, i am wanting to add a voucher to the end of my feedback form to thank the participants for completing the form, is this possible?

If you would like to display the image of your voucher in the form, you could do it through a Text field:

As well, you could attach it in an autoresponder email notification: https://www.jotform.com/help/26-Setting-up-an-Autoresponder-Email 

Let us know if you have more questions.