Losing, retain and regaining Belgian citizenship
Subject to certain conditions, both adults and minors can lose Belgian citizenship. Two possibilities exist for adults: either no declaration stating their intention to retain Belgian citizenship (déclaration de conservation/behoudsverklaring) or they choose to renounce their Belgian citizenship. Minors may lose Belgian citizenship if a parent loses Belgian citizenship or if they are adopted by a foreigner.
Persons who lost the Belgian nationality in the past, can regain it under certain conditions. From 1 January 2013 on, only persons who have their principal residence in Belgium on the basis of a legal residence permit, can regain the Belgian nationality.
For further information on the conditions regarding the re-acquisition of the Belgian nationality, please contact the civil registrar of your municipality.