How to remove activation lock if Apple ID and password for activation lock are forgotten?
I got apple watch from my sister and it seems her 10 year old son set up the watch and doesn't remember the password. What can I do?
[Re-Titled by Moderator]
If her son does not remember the Lock Screen code, you will have to reset the watch, as described in this article:
If you forgot your Apple Watch passcode - Apple Support
In case this is about the Activation Lock and the Apple ID password, and you have proof of purchase, look at this article, before you contact the official Apple Support: