All United States notes are printed in sheets of four notes of one denomination on each sheet. Each note is lettered and numbered twice. All notes of which the number when divided by 4, shows remainder of one,have the check letter A; a remainder of 2, the check letter B; a remainder of 3, the check letter C; those numbers which divided by 4,show no remainder, have the check letter D. Any United States note the number of which cannot be divided by 4 and show one of the foregoing results is a counterfeit.

There are no secrets in the art of detecting counterfeits. Careful study, long experience, and a thorough familiarity with all kinds of genuine bills, will make any person an expert. Banks are required by law to stamp as "Counterfeit" all bad bills coming into their possession.