Time to repair ?

Large tears or spots can significantly reduce the value of your certificate by up to 70%!  Do try out repairs on a spare less preserved certificate that even might go lost in the process. Don't use ordinary adhesive tape. In its most recent issue from April 2010, Scripophily magazine discusses quite in depth how and when to repair tears, remove dirt or dealer pencil markings and much more. The magazine is published by the International Bond & Share Society.