Check the paper texture; genuine U.S. currency paper feels crisp and slightly rough, not like regular printer paper
Look for a clear watermark only if the bill is a modern series with one; older $2 bills may not have one
Hold the bill to the light and check for an embedded security thread on newer notes; older $2 bills may not have one
Examine the portrait and printing quality; real bills have sharp, detailed lines and fine engraving
Look for raised ink; authentic currency often has slightly raised printing you can feel
Inspect the serial numbers; they should be evenly spaced, matching, and printed in the same ink style
Check the Treasury seal and Federal Reserve seal; they should be crisp and properly aligned
Compare the bill to a known genuine $2 bill for size, color, and design details
Verify the Federal Reserve district letter and serial number prefix are consistent with the series
Use a magnifying glass to look for microprinting and tiny details that are hard to reproduce
Check for color-shifting ink on newer series notes, if applicable
Make sure the bill’s edges are clean and the cut is consistent with genuine currency
Feel for the security fibers embedded in the paper on newer notes
Compare the bill’s overall design to the correct series year, since $2 bills have changed over time
If uncertain, take the bill to a bank or currency expert for authentication