A method and a network node device for auditing a Visitor Location Register (VLR) to manage communication device retention. The method comprises, when the age of a communication device's age in the VLR reaches or exceeds a first threshold, triggering a request to a Mobility Management Entity (MME) to notify the VLR of the communication device's activity. The method further comprises receiving a notification from the MME indicating the communication device's activity, and updating the communication device's aging information based on the notification.