These are referred to as safety threads. Whenever you hold up US dollars, to The sunshine, the security threads need to look like a Element of the Take note, instead of remaining printed on it. The offers that surface Within this desk are from partnerships from which Investopedia receives compensation. https://romeoyjulietawidechurchil25824.targetblogs.com/35667424/the-ultimate-guide-to-fake-us-dollar-bills