Some appropriate measures to protect the secrecy of the ballot in relation to postal voting should be taken as an example. Parliament must take measures in order to ensure that the principle of secret suffrage is protected. In this context, different systems require the elector to complete the ballot paper individually, ensuring that he/she is not being watched, place it in the electoral envelope and make a solemn statement to the effect that the ballot paper was personally completed (see Federal Constitutional Court of Germany, BVerfGE 21, 200 [205]).