In Arizona, a party filing a complaint has 120 days to serve it. It sounds like you have not been served with the complaint. ME stands for Minute Entry. The Notice therefore is probably a Notice from the Court that the case will be dismissed if it is not timely served. If that is all that is there, you do not need to do anything. Does the Collection Agency that is suing you know where to serve you? If they don't have a current address, they may resort to service by publication in a newspaper. You might want to check the docket periodically over the next 30 days to see if they try some alternative form of service, such as by publication, or whether the complaint gets dismissed. If they do serve you with the complaint, you will want to retain an attorney to defend you.