How do you sign contracts over the internet? Are e-signatures valid?We'll help you craft the best vendor contract agreement for your specific needs, and help you manage that relationship as long as you need it. Form: E-Commerce Agreement. This guide will inform you of various legal requirements and direct you to additional resources. Learn which contracts are common to e-commerce businesses and how to manage high-volume transactions online. Minimize legal risk. Download our free ecommerce terms and conditions template your online store and learn how to fill it out properly with examples. Legally binding contracts are extremely important because they protect the interests of your business and define the relationship between parties.