currently, you are required to complete the following for "Change Registered Email Address"
Your Current Email Address:
Your New Email Address:
Confirm New Email Address:
Your Current Password:

I recommend these fields instead
Your New Email Address:
Confirm New Email Address:
Your Current Password:
Your Current Forum Gold Password:

as 1 of the reason why user changed their registered email address is because the forgot their current email address

maybe I am the only one who forget the current email address

thanks and please consider

kindly ignore this suggestion as Vincenzo said that this is not feasible due to security reason

cheers