If I understand correctly, you're asking if you need to provide a certificate in order to become eligible for the Upwork Skill Certifications program? If that's the case you definitely should add any certificates you have related to the services you're offering on Upwork to your profile but that's not a specific requirement for participating in this invite-only program. For the best chance of being invited, we suggest freelancers achieve a solid reputation, keep a complete and up-to-date profile that is not set to private, and maintain an active Upwork account in good standing.
You can find more information in Lena's opening post. Feel free to follow up if you need further advice or guidance.
We currently have 10 skill certifications in the Web & Mobile Software Development and 16 in Design & Creative categories. We hope to expand skill certifications to other categories in the future.
I'm sorry for the late response. Currently, we're only offering certifications in the Web, Mobile, & Software Development category, and in the Design & Creative category. We'll make sure to share with the Community if we will already expand to other categories. You may read more about it here.
In the meantime, I'll let the team know that you are interested to have these included.