Can family members modify household registration information?

Hello! This depends on the specific situation. If the minor is a minor, it can be handled by the guardian. If he is an adult and has full capacity for civil conduct, he needs to deal with it himself in principle. As for whether it can be handled by family members, due to different local policies, the regulations of the household registration department of the local public security organ shall prevail. You can contact the local police station for consultation before handling it.