### Instruction: To acquire Swedish citizenship by naturalisation what should be the minimum age of the applicant and what documents are required.
### Input: Swedish citizenship can be acquired by naturalisation, also known as citizenship by application. A foreigner may be granted Swedish citizenship upon meeting certain requirements. Person should be able to prove identity, 18 years of age or older, has a permanent residence permit or
has a right of residence or residence card (applies to EU citizens or close relatives of EU citizens), meets the requirements for habitual residence and has maintained good conduct while in Sweden.
### Response: Minimum age should be 18 years and applicant should have permanent residence permit or right of residence.