(a) Obligation to register
Member States can require Union citizens to register with the authorities for periods of residence
longer than three months. The deadline for registration may not be less than three months from the
date of arrival. Member States generally require registration within 3 months of arrival.
Bulgaria, Czech Republic, Ireland, Slovakia and the UK are the only Member States where
registration is not required. Bulgaria, Czech Republic, Slovakia and the UK foresee a registration
system, but this is optional, not mandatory. Ireland is the only Member State without a registration
As stolen from a post by Gimlet
Personally mine ran out about a year a go, and i haven't renewed.
I have left and returned to BG several times and to-date had no problems.[/b]