Yes, you must sign a contract (talent agreement) before working on a brand sponsorship campaign. This protects both you and the brand, clearly outlining your deliverables to receive payment.
However, promoting products featuring an affiliate link generated on our platform that is not part of a brand sponsorship campaign requires no contract. You can take a look at the Terms and Conditions for the specific brand or retailer in our portal or the General Terms and Conditions for the New Engen Creators platform for more details.