if you can duplicate the “features” in the WHLFCOLB.pdf with a scan, you would be the first. (it just can’t happen.)
Scan a cancelled check - and show us the layers, grouping of content in layers, layer bit characteristics, absence of color abberations in a color scan, pixelation characteristics, some portions of text in dark green - some black, kerning, character misalignment from typewriter characteristics.
Please inform us of your process and scanner setting when you produce your results, so we could duplicate your process.
I downloaded the White House document and viewed it in Foxit Reader, as suggested in the article. I noticed that the 1 in the serial number seemed to pop into the image slightly late (I was using Remote Desktop into a Windows box, exaggerating any display delays). I see similar effects when I examine PDFs of documents I myself scanned. It's no big deal it's just how the software works.
But the real point is, we don't have to rely on document analysis to refute or confirm the document. We now have Dr. Onaka's official authentication. It might not be good enough for the birthers, but it will stand up just fine in court.