Grubhub and Seamless are offering new and existing customers $10 off orders of $15 or more through their app when you use promo code: VENMOTREAT during checkout and pay with Venmo for a limited time. You must use their mobile app in order to checkout with Venmo. Only valid on personal (non-corporate) accounts. Limited to 1 redemption per diner during the Promo Period. Offer ends September 24, 2018.