This document provides tips on how to ask vendors about the accessibility of their products and services. It suggests asking 5 questions to get information from vendors, as well as 4 things you can do yourself to research a product's accessibility, such as reading accessibility policies and testing products with assistive technologies. Finally, it discusses 3 ways to work with vendors to improve accessibility over the product development lifecycle. The overall message is that engaging in respectful dialogue and sharing user needs and pain points can help lead to more accessible outcomes.