Dry skin lacks the moisture needed for optical sensors to read ridges. Have users rub their hands together or use a water-based moisturizer.
If the device displays "Authentication Failure" immediately upon startup, use this method to clear problematic license data: Prepare a USB Drive : Use a drive formatted as Create Folder
ZKTeco official documentation specifically recommends deleting the enrolled fingerprint and re-enrolling the finger, or trying a different finger entirely, when encountering low acceptance ratios. zkteco authentication failure solution best
Install devices at eye level with consistent indoor lighting to prevent facial recognition errors.
Use this hierarchy of solutions. Start at step one and move down until success. Dry skin lacks the moisture needed for optical
Here is a breakdown of the most frequent ZKTeco authentication failure scenarios, along with the best solutions for each.
When anti-passback mode is enabled, only a person who has entered through a door can exit through that same door. This safety feature can prevent access if the system believes a user is attempting to re-enter without having properly exited first. If anti-passback mode is in use and a user experiences authentication success without door opening, verify that anti-passback rules are satisfied. Install devices at eye level with consistent indoor
ZKTeco biometric devices are industry staples for time attendance and access control, but when they encounter an , they can disrupt business operations. Whether it is a finger, face, or card that fails to register, the problem is usually fixable.
Verify the , Gateway , and Subnet Mask are correct.
For fingerprint scanners, clean the optical sensor with a soft, lint-free cloth. If users still fail, try re-enrolling fingerprints or ensure fingers are dry. Software & Connection Troubleshooting