Transfer:
- Find out the Apple ID (email address) and Team ID that you want to transfer the app to.
- Go to https://appstoreconnect.apple.com/
- Login with your existing account
- Backup your data
- Downloads
- Pricing
- Usage analytics
- Click on the Transfer app button on the account overview page
- There are a few things you might need to configure or remove from the account before you can submit the transfer request.
- Once you submit the request the other party needs to accept the transfer.
- If you need to need access to the new account for any reason, you need to ask the new owner for a membership invite.