Please follow the steps below to update your new Membership number in the BJ's Mobile App.
1. Download the BJ's Mobile App.
2. Login to the app using the old membership number (Login ID and Password)
3. In the top right hand corner of the app, select the My Account icon
4. This will bring you to a screen that says Hi, [YOUR NAME]! On this page, select "Membership information"
5. In membership information page, tap on "Edit" beside "Primary Membership"
6. Update the new membership number.
7. Tap on Save changes.