STEP 1 Log in to developer.apple.com with your Apple ID email
STEP 2 Click on Membership on the top left
STEP 3 Copy your Team ID
STEP 4 Send en email to email@example.com
For the Subject, specify: App transfer team id and Apple ID for app transfer
For the Body: Include your Apple Team ID, Apple ID email, App name, and MyStudio Email login.
We will reach out to you within a few days when we have initiated your app transfer. At that point, you will then complete the app transfer by accepting the app as described in these instructions — https://intercom.help/mystudio/en/articles/3059837-step-2-accept-the-app-transfer