Possess several nationalities

You can lose your Belgian nationality after voluntarily acquiring a foreign nationality. You can find more on this under the section entitled "10. How can I lose my Belgian nationality?"

However, if you are a Belgian citizen and you automatically receive another nationality (= without having taken any steps to do so, e.g., at birth because your parents have a different nationality), you do not lose your Belgian nationality because of this and can therefore have two or more nationalities. You will, nevertheless always be considered a Belgian citizen by the Belgian authorities.

If you hold another nationality and you obtain Belgian nationality, Belgian authorities will not ask you to renounce your original nationality. It is nevertheless advisable that you go to your national authorities to find out whether the acquisition of the Belgian nationality would result in the loss of your nationality of origin according to the legislation in force in your country.