Yes, if you submit a registered trademark in the Clearinghouse and wish to benefit from the Sunrise service, you will have to submit a single sample of Proof of Use as well as a signed declaration of Proof of Use. You can find more information concerning the Proof of Use in the Trademark Clearinghouse Guidelines available on this website.
To benefit from the Sunrise service, do I need to submit a sample of Proof of Use even if my trademark registration is based on proven usage?
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