In
T 154/90 (OJ 1993, 505) the opponents had initially insisted on oral proceedings, although the opposition division did not consider that they were necessary. However,
eight days before the arranged date the opponents informed the opposition division that they wished to cancel the oral proceedings. For reasons of internal organisation at the EPO, the opposition division did not receive this letter until after the date of the oral proceedings. The board of appeal ruled that eight days was a sufficient period of time for the oral proceedings to be cancelled, since no evaluation of new facts or arguments was needed (the case was different in
T 10/82, OJ 1983, 407). Since the letter was received too late for purely internal reasons, the opponents were not at fault. They were not obliged to bear a part of the costs of the other party. A change of opinion regarding the necessity of oral proceedings could not be regarded as culpable conduct either (see also
T 383/05).