You are able to use an expired voucher and a discount code together. Vouchers that have NOT expired, cannot be combined with other offers.
To apply an expired voucher and a promotion code from Canvas On Demand toward your order, first enter the promotional code when prompted, NOT the expired voucher, and click apply. After you select your canvas options and have proceeded to the shopping cart, enter the expired voucher redemption code in the notes box. It will not show as applied when you check out, but it WILL be applied before you are charged.