Most first-generation migrants must live in Denmark for nine years to be eligible for Danish citizenship, although Nordic citizens may apply after only two years. The Danish-born children and grandchildren of immigrants (the second- and third- generation) also face extra conditions. Migrants who wish to naturalise must meet the second least favourable conditions in the 28 after AT. Conditions include expensive written language and citizenship tests, and stringent checks on their criminal record and income. Naturalised citizens are partially secure in their status as Danish nationals, particularly since the state cannot withdraw citizenship if it would lead to statelessness. Dual nationality is not allowed for children born in the country or for most naturalising citizens.
