Short answer
To add or remove a joint account holder, contact us
You'll need to add your joint account holder to each account you want them to access
More info
We won’t need to talk to the joint account holder but will need some of their details
If you move with Origin, you'll get a new account at your new address, so you'll need to contact us to re-add your joint account holder.
For information about what joint accounts are authorised to do, see our Joint account holders article.