A system, methods, node, and non-transitory computer readable medium storing a computer program, for deregistration of a user equipment from the source control node are described. The user equipment is registered in the source control node and in a subscriber database while roaming from the source control node to a target control node. The method in the source control node comprises receiving an identification request message from the target control node, the identification request requesting identification and security related information. The method in the source control node further comprises, as triggered by the identification request message, starting a time supervision supervising reception of a cancel location message from the subscriber database. When the time supervision expires, the user equipment is deregistered from the source control node.