Check the paper texture for unusual smoothness, stiffness, or slickness
Hold the bill up to light to see the watermark
Look for the security thread embedded in the bill
Tilt the bill to see color-shifting ink
Check for raised printing on genuine notes
Compare the bill to a known genuine bill of the same denomination
Inspect the microprinting with a magnifying glass
Verify the serial numbers match and look properly printed
Look for blurry images, uneven borders, or faded details
Check for missing security features for that denomination
Use a counterfeit detection pen if appropriate
Feel for differences in thickness or overall quality
Examine the bill under UV light if available
Confirm the design matches the current official currency version