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Factor Six: The "serial number" is also the sixth security factor for these banknotes that consists of numbers and letters that are shown in a different way than normal if they are taken against a light.
Seventh Factor: The seventh security banner is the dollar's "3D security tape", which is located in blue or purple on 100-dollar notes.Ways to Detect Fake Dollar
Factor Six: The "serial number" is also the sixth security factor for these banknotes that consists of numbers and letters that are shown in a different way than normal if they are taken against a light.
Seventh Factor: The seventh security banner is the dollar's "3D security tape", which is located in blue or purple on 100-dollar notes.