In respect of registered industrial property rights (patents, utility models, industrial designs, topographies of microelectronic semiconductor products, trademarks and geographical indications) the Hungarian Patent Office on request certifies the rights of the owner by issuing a copy of the registered data on payment of a fee. (See e.g. Article 54(4) of the Patent Act, Article 47(4) of the Trademark Act.)
The copy of the registered data is a public (authentic) document mostly required by courts to establish ownership in such procedures.
Taking into account the fact that registration of assignments or licenses of exploitation are not mandatory under Hungarian law, the courts may also accept private documents (contracts) constituting conclusive evidence submitted by the plaintiff to establish ownership.
For further details, please, see the replies to questions 25 and 26.