I buy a used Apple Watch I don’t know how to remove the activation

Adding to Niel's comment.

Most of the time when someone comes here asking to remove Activation Lock on a used Apple Watch they bought, they more often than not have been scammed and they bought a stolen Apple Watch. You cannot remove Activation Lock. Apple will NOT help you remove Activation Lock. We cannot help you remove Activation Lock.

If you bought this watch from someone you know or can actually reach and they didn't prepare the watch correctly for a new owner, they MUST remove the watch from their account. If they can't or you don't know them or can't reach them, the watch is useless to you. If this is your scenario, see if you can get your money back. If you can't get your money back, recycle the watch responsibly as it will NEVER be able to be used.

Read this --> The All Too Common SAD Reality of Buying … - Apple Community

Ask the seller to remove the lock or give you a refund, or if applicable, ask the people running the store or website you bought it through for a refund. It's an anti-theft measure.

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