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"In order to safeguard the ballot, in many countries ballot papers bear an official stamp specific to the polling station and/or the signature of authorised polling station officials. Some electoral laws contain clear and detailed provisions on that subject. According to the Code of Good Practice in Electoral Matters, the signing and stamping of ballot papers should not take place at the point at which the ballot is presented to the voter because, theoretically, the stamp or the signature might mark the ballot in such a way that the voter could be identified later during the count. (CDL-AD(2002)023rev, para. 34). Even more important is that the ballots are not stamped by a member of the polling station commission after the voter has made his/her choice.
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