A.) - No, according to the US Bureau of Engraving and Printing, specific regulations about defacing currency are outlined. In short, anything that renders the bill unusuable would count as defacing. As you may imagine, The Ron Paul Stamp Act, is not the first to think of using currency as a means to spread a message. We absolutely have the intent for the currency to be reissued, it's the only way for the word to spread. We chose a small stamp and message to ensure the bill remains usable. If doing this personally, please only affix one stamp per bill. If you like the idea of this, we advise checking out www.wheresgeorge.com , another site that offers stamping on bills and tracks them for hobbyists.