Check the paper texture and feel for unusual smoothness, stiffness, or thinness
Hold the bill up to light to verify watermarks and security threads
Look for color-shifting ink on denominations that include it
Inspect microprinting for sharp, clear text rather than blur or smudging
Compare the bill against a known genuine note of the same denomination
Examine the portrait, borders, and fine details for poor printing quality
Check for raised printing by lightly feeling the ink on genuine notes
Use a UV light to verify fluorescent security features where applicable
Verify serial numbers for matching style, spacing, and consistency
Look for missing, damaged, or poorly aligned security features
Tilt the bill to see holograms or reflective elements if present
Use a counterfeit detection pen only as a quick preliminary check
Count and inspect bills individually instead of in stacks
Reject notes with unusual discoloration, uneven edges, or suspicious wear
Use a counterfeit detection device for higher-volume cash handling
Report suspected counterfeit currency to the proper authorities or bank