Exotic markings on US currency
Hey, dudes and dudettes, I've been noting a lot of unusual markings (rubber stamps, etc.) on large US bills, usually $100 and $50 bills. As an example, I have one in front of me that has the number "09-943085" and the words "hashim shaheen" in arabic. Other examples are: Chinese words (e.g. "crystal"), ornate seals in Urdu, and occult signs (e.g. letters of the witch's alphabet).
Has anyone else observed this, and if so, do you know the significance?