PRC and Photo ID verification?

Is it normal for some sites to ask for photo ID to verify your identity? If so, I am very uncomfortable as well as somewhat concerned about my data. I signed to participate in an online focus group by PRC and some of them told me that they need proof of identification and a selfie to confirm my identify. I do not want my identity ro stolen or anything but they may require some proof to see if I am legit. What should I do? Are these valid concerns?

submitted by /u/Guergy
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source https://www.reddit.com/r/beermoney/comments/1fxikc1/prc_and_photo_id_verification/