You may decide to complain if you have been denied access to the information you have requested and you think that this decision is disproportional and lacks sufficient or valid reasoning.
If you decide to complain you can challenge the decision made by the institution with a supervisory body. In Estonia, the supervision of access to public information is exercised by the Data Protection Inspectorate and the Estonian Information System’s Authority. If you do not want to turn to the supervisory bodies, you can challenge the decision by filing an action against the state institution in the administrative court.