What should I do with the check after I’ve submitted a mobile deposit?

Upon the receipt of confirmation from CCFBank that we have received an image that you have transmitted, you agree to retain the check for at least thirty (30) calendar days from the date of the image transmission. After thirty (30) days, you agree to destroy the check that you transmitted as an image, mark it “VOID”, or otherwise render it incapable of further transmission, deposit, or presentment. During the time the retained check is available, you agree to keep it in a secure location and promptly provide it to the Bank upon request.