Declaration of residence
The Migration Department informs that after the entry into force on 1 March 2021 of amendments to the Law of the Republic of Lithuania “On the Legal Status of Aliens”, an alien may choose when to declare residence in Lithuania - in the Migration Department, when applying for a residence permit or after collecting a residence permit.
More about declaration: https://migracija.lrv.lt/en/news/declaration-of-the-place-of-residence-will-be-easier-for-aliens
When leaving Lithuania for a longer than 6-month period it is necessary to declare the departure in the same way. The individuals who are leaving Lithuania for longer than a 6-month period and who failed to submit a declaration before leaving, can declare it at diplomatic missions or consular posts of the Republic of Lithuania or on the Internet through e-government portal.