If I own a Roku device that I am not using, can I deactivate it and give it to a family member to activate and use?
Yes. I have gifted several.
DBDukes
Roku Community Streaming Expert
Note: I am not a Roku employee.
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Unlink it from your account at https://my.roku.com and perform a factory reset before you gift it.
https://support.roku.com/article/208757008-How-to-factory-reset-before-returning-selling-or-gifting