Top image
shows the same check that has been warmed beyond room temperature
to verify the hidden word VALID in both the PAY and SIGNATURE area
of interest. Below this is a complete scanned image of the original
document compressed into a low resolution bitmap, similar to how
the bank will store your check. The scans below it show the signature
area magnyfied to show the ability to discover an alteration through
analysis. The robustness of the characters left behind and when compared
to the original will show most alterations easily.
