Under certain circumstances the Netherlands Nationality Act allows dual nationality. However, the Netherlands nationality will be lost in most cases where naturalisation to another nationality has been effected voluntarily.

There are important amendments to the Netherlands Nationality Act as per 1 April 2003. These changes are contained in the brochure  Netherlands Nationality Act (RWN) - amendments as of 1 April 2003.

Under the amended Nationality Act of 1 April 2003, (unofficially translated) an adult who voluntarily acquires the nationality of another country, will lose his/her Dutch nationality except in the following cases:
- if you were born in the country of your other nationality and were living there when you acquired the nationality of that country; or
- if you, before you turned 18, lived in the country of that other nationality for an uninterrupted period of five years, or
- if you are married to a person who possesses the nationality you wish to acquire.

A Dutch adult with dual nationality living abroad:
If you hold a foreign nationality alongside the Dutch nationality for ten years, and have residency outside the Kingdom of the Netherlands and the European Union for ten years after reaching the age of 18 or after reaching adulthood e.g. through  marriage, you will lose your Dutch nationality.
However:
You can ensure that you retain your Dutch nationality by:
- having your principal residence in the Kingdom of the Netherlands or the European Union for at least one year; or
- obtaining a Dutch passport or proof of Dutch nationality before the end of the ten-year period.

A new ten-year period starts on the day you are issued with a passport or proof of Dutch nationality.

For detailed information on your nationality or that of your children you can contact the nearest Consulate (General) . You can also visit the following website:  www.wetten.overheid.nl.

If you are a former Dutch citizen and you would like to regain the Dutch nationality by naturalisation, you are advised to read the brochure `Nederlanderschap herleeft` (at present only available in Dutch).

You may also contact the Netherlands representation in your region.