after checkout thank you page

i have 1 store. in that store i have 1 item that i want to show a different thank you page from the items sold after checkout has been completed. i want to be able to email a user choosen file to myself. i have a form and an email php made but i would like to show the form after checkout is completed.

can i do this?

Checked here already on what exists for your Version ?
Ernie
https://www.opencart.com/index.php?rout ... ch=success