A statement of withdrawal of appeal made by the (sole) appellant after the final decision of the board has been announced at oral proceedings does not relieve the board of its duty to issue and notify to the appellant the decision in writing setting out the reasons for the decision in order to conclude the decision-taking procedure triggered by the announcement of the final decision at the oral proceedings, which had already become effective under G 12/91 (OJ 1994, 285) (T 1033/04).