July 1-3- The Battle of Gettysburg, Pennsylvania. The bloodiest battle of the Civil War dashes Robert E. Lee's hopes for a successful invasion of the North. July 4- Vicksburg, Mississippi, surrenders to the Union Army under Grant.
Method. 1  Test the pen to make sure it can tell the difference between good money and computer paper. 2  Apply spray starch to the next dollar bill in an attempt to make it read as fake. 3  After drying, test the results by re-applying the counterfeit money detector pen to both the dollar and to the computer paper.
Best Answer: Duplicate checks have a really thin carbon-copy type paper behind the real check. You write a check, tear it off and send it off, but you still have a duplicate copy of your check for your records. The duplicate copies have the account number and signature areas already blacked out so they can't be used as a check.