56. Which institution(s) is responsible for examining financial reports and/or investigating violations?

Parliamentary Elections, 8 April 2018 ODIHR Limited Election Observation Mission Final Report

https://www.osce.org/odihr/elections/hungary/385959?download=true

The SAO exercise oversight over party and campaign financing. Parties are audited on a biannual basis, which recently resulted in fines for several parties, including a total of HUF 663 million for Jobbik for violating spending regulations.