There is an email AFAIK, but it doesn't come from the current owner.
For him, it's only
Shoahey: clicking on the name I want to transfer ownership to and clicking on the transfer bar.
Next, the new man/woman should receive an email from WGT(!) with a link to click and confirm the transfer. I'd say that this should be "immediately" - see no reason for any delay.
It would be wise precaution to check if WGT mails arrive at the prospective new owner.
Long ago, I always thought that common disturbances in receiving mails from WGT were responsible for any delay or failure of this transfer, but now, there are so many new faults around that it may have another reason.
Anyway, only WGT might help here :(