How to spot fake 100 US dollars?
Could you please explain, in detail, the steps one should take to accurately identify a counterfeit 100 US dollar bill? Are there any specific security features that one should be looking out for, such as the watermark, security thread, or color-shifting ink? Additionally, are there any common red flags or patterns that are indicative of a fake bill, such as a lack of crispness or uneven printing? Lastly, what resources or tools are available to the average person to help them in their efforts to authenticate currency?