In TÂ 1500/10 the board held that, if oral proceedings take place at the instance of the EPO because it considers this to be expedient, the party has an obligation to attend the oral proceedings. Parties do not have the right to decide in which way the proceedings as a whole are to be conducted. There is no right to a solely written procedure.
Source: http://www.epo.org/law-practice/legal-texts/html/caselaw/2019/e/clr_iii_c_3_2.htm
Date retrieved: 17 May 2021