pop up in check out?

Im currently hosting a fundraiser on my website. People purchase something and go in the draw to win prizes, but all the proceeds need to go into another bank account. Even though i keep stating not to pay with Paypal or put into my bank account, they are still doing it and i have to keep giving paypal refunds and editing their invoices and resending them…

SOooo im wondering if there is anyway of having a pop up window everytime they go into review cart, to say ‘if you are purchasing an image for the Copeland Family Prize draw, please select XXX bank account below’??

Possible or not? Thanks :slight_smile: