I received an invitation link to join a Duo Deal. Do I need to sign up to proceed the order checkout?

No, you can accept the invite and complete the checkout without signing up. Please review the step-by-step guide here.

For more details and guidance, please refer to the official Duo Deal guide. 

https://blidz.zendesk.com/hc/en-us/sections/360005177140-Duo-Deal-Official-Guide