What happens if I fail to register in my US state while living permanently abroad?

Failure to register is a separate criminal offence under both state law and federal SORNA, potentially resulting in a warrant for your arrest. This warrant can be entered into NCIC and transmitted internationally, creating risk of detention if you transit through countries with US extradition treaties or strong law enforcement cooperation. Some states require periodic in-person registration regardless of residence abroad, while others accept written notification. The statute of limitations varies by jurisdiction, but many states treat registration violations as continuing offences with no limitations period.