McDonald’s survey coupons, earned through the mcdvoice.com survey, are typically valid for in-store orders but not for online or app purchases. After completing the survey, customers receive a validation code to redeem during their next visit at a participating McDonald's location. However, these coupons generally cannot be applied to online, mobile, or delivery orders. To use the discount, customers must present the coupon code at the counter or drive-thru. Since policies may vary by location, it’s best to check with your local McDonald’s to confirm whether mcdvoice.com survey coupons can be used for digital orders.