Fingerprints is one of the evidences you can find in Phasmophobia which helps you determine what ghost it is.
To detect fingerprints, you need a UV light source, such as a UV flashlight or a UV stick.
Here’s how you can use a UV flashlight to detect fingerprints in Phasmophobia.
How to detect fingerprints
Fingerprints are usually detectable on certain surfaces.
The fingerprints are normally found inside or nearby the room / area where the ghost is detected. They are green in color when seen with UV light.
Look for fingerprints on doors and windows as they’re most of the time there.
The best item is the UV flashlight instead of the UV stick. The latter is mostly used to detect footprints on salt instead.