Who can use Postmates Delivery on Square? Natalie W. April 02, 2020 16:00 Updated Any US merchants currently on the Square platform is eligible to use Postmates Delivery on Square. Sign up quickly and easily at http://square.postmates.com/products/delivery/ Related articles How do I create a delivery on Square? What is Postmates delivery on Square? How will I know when a delivery has been completed? What if I have an issue with a delivery? How does pricing work?