Start a request at the end of this page, https://support.apple.com/en-us/108934 https://support.apple.com/en-us/108934, if it gets that far, but I would exhaust

Start a request at the end of this page, https://support.apple.com/en-us/108934 https://support.apple.com/en-us/108934, if it gets that far, but I would exhaust all options first. Should look into account password first. If he has started account recovery, Activation Lock removal will fail.