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<p>[QUOTE=&quot;numismatic_bernard, post: 2310281, member: 76437&quot;]Dear experts,</p><p><br /></p><p>Many thanks for your reply!</p><p><br /></p><p>So perforation was done to cancel the &quot;validity&quot; of the circulated banknote in other words so that it no longer can be used.</p><p><br /></p><p>I assume this is actually the same as stamping &quot;Invalid&quot; text on the banknote itself. One such example, I just managed to find online:</p><p><a href="http://www.poinsignon-numismatique.com/banknotes_r1/germany-emergency-notes-1914-1923-a-j_c7153/gdansk-poland_p7483/allemagne-danzig-gdansk-pologne-stadt-billet-20-mark-15-11-1918-cachet-ungultig_article_55509.html" target="_blank" class="externalLink ProxyLink" data-proxy-href="http://www.poinsignon-numismatique.com/banknotes_r1/germany-emergency-notes-1914-1923-a-j_c7153/gdansk-poland_p7483/allemagne-danzig-gdansk-pologne-stadt-billet-20-mark-15-11-1918-cachet-ungultig_article_55509.html" rel="nofollow">http://www.poinsignon-numismatique.com/banknotes_r1/germany-emergency-notes-1914-1923-a-j_c7153/gdansk-poland_p7483/allemagne-danzig-gdansk-pologne-stadt-billet-20-mark-15-11-1918-cachet-ungultig_article_55509.html</a></p><p><br /></p><p>Many thanks again!</p><p><br /></p><p>Best regards[/QUOTE]</p><p><br /></p>

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