If you are a resident and registered in the Netherlands, bring an extract from the population registration ("Uittreksel Basisregistratie Personen", BRP), from the Dutch municipality where you are registered. This extract should state your Swedish citizenship. The document must be original and no older than one month. Alternatively, a Dutch residence permit (verblijfsdocument) may be presented.
If you live in Belgium, bring your residence permit card showing your Swedish nationality.
If you live in Germany, bring your “Meldebescheinigung” showing your Swedish nationality.
If you are residing in another country, a certificate of registration with information on Swedish citizenship must be presented from the country's authority, or a valid residence permit from the country. The certificate may not be older than one month.
Link to read more about the Personal Records Database in the Netherlands.