“I noticed the possible "layers" in this document almost immediately. When I had the .pdf file of the BC  (birth certificate) open in my browser then used Command + Tab (on an Apple computer), to switch to another app, I noticed that the majority of the text disappeared. I recreated the effect numerous times. As others have suggested, when you open the BC in Acrobat (full version) and strip out the "Metadata" and "Deleted or cropped content" this SAME EXACT TEXT disappears leaving only a few bits of type, date stamps and all or part of three signatures: his mother, the attendant and the local registrar. Also, some of the digits used in the Aug. 8, 1961 date stamp disappear. The full background and the April 25, 2011 stamp remain. I am making no "birther" claims, but CLEARLY this document has been altered. If it had been photographed or scanned, the pixels containing all the information (the document background, the type, the signatures, date stamps and the check marks) would be part of ONE pixelated image. As someone who uses Photoshop/Adobe Creative Suite daily, it is my belief that had the BC been scanned or photographed, the layering would not happen. Again, I am making NO "birther" claims or conclusions. But I believe this document has been altered.”