Each auction item should also be catalogued with a date and where the item was signed. This adds a level of authenticity thats difficult to copy, Especially in an age when a simple Web search will turn up the whereabouts of just about any celebrity on the planet at any given moment in time. All these details should be included on the certificates of authenticity provided with your fundraising items. Theres one more thing to those certificate should include, and that ones a biggie.