Here is one way to make sure that MACO is unenrolled from all devices that have been enrolled using this particular account: 
 

• Step 1: In case credentials have been compromised, have the member change their password, then enroll for MACO
• Step 2:  If the member sees the message, “Previous Enrollment Found,” that indicates that another device has, in fact, enrolled with MACO. (Less commonly, this message could also mean that the member had previously enrolled but hit “Reset All App Data” and then tried enrolling again.)
• Step 3:  Once enrolled, the “Reset Authentication Options on All Devices” feature is enabled and can be used.  Doing that will disable MACO on any device that had enrolled using that account. 

Remember that MACO is not aware when a password reset has taken place.  So even after a password has been reset or changed, MACO will still allow the member to sign in.  Changing the password AND resetting MACO is the only way to ensure you've removed access via MACO. 
 

Step-by-Step Images:

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In the case of compromised credentials, how your credit union proceeds with this type of situation is based on your policy. You could unenroll/block the member from online banking within Tool #14 Member Personal Banker. You could close this membership and open a new one.  The member can change their password again (this will have no affect on their MACO logins), they can change their security questions again, and/or change their username (based on your credit union's ARU/online banking configuration). In the end it is up to your credit union as to how the process is handled.