---
title: Why Isn't My Scanner Reading This ID?
description: This is for common miscrops and oversized id errors or incorrect names
---

[Skip to content](https://support.patronscan.com/why-isnt-my-scanner-reading-this-id#main-content)

English

Show submenu for translations

![Patronscan Logo Horizontal](https://support.patronscan.com/hs-fs/hubfs/Patronscan%20Logo%20Dec%202025%20BambooHR.png?width=350&height=54&name=Patronscan%20Logo%20Dec%202025%20BambooHR.png)

Open main navigation

Close main navigation

- English
  
  Show submenu for translations
- Go to patronscan.com

 Go to patronscan.com

 Hello. How can we help you?

- There are no suggestions because the search field is empty.

1. [Patronscan Support Articles](https://support.patronscan.com/?hsLang=en)
2. [FAQs](https://support.patronscan.com/faqs?hsLang=en)
3. [Guard](https://support.patronscan.com/faqs?hsLang=en#guard)

# Why Isn't My Scanner Reading This ID?

## A step-by-step guide covering the most common reasons an ID fails to scan.

#### **1. Dirty or Damaged Glass**

### **Symptoms**

- ID not detected
- “Oversized ID” error
- Cropped or misaligned scans
- Blurry or inconsistent images

### **Cause**

Debris, smudges, or scratches on the scanner glass can interfere with how the device detects and crops the ID. In some cases, damaged glass can distort the scan entirely.

### **Resolution**

1. Inspect the glass for: 
     - Dirt or dust
     - Fingerprints or smudges
     - Scratches or physical damage
2. Clean the glass using a microfiber cloth and appropriate glass cleaner.
3. Dry the surface completely before use.
4. If the glass is very scratched and damaged please contact patronscan support for replacement glass.

**Note:**  
If you are receiving an **“Oversized ID”** error, thoroughly clean the glass. Even small obstructions can cause the scanner to misread the ID boundaries and result in improper cropping.

- [FAQs](https://support.patronscan.com/faqs?hsLang=en#main-content)

    - [Guard](https://support.patronscan.com/faqs?hsLang=en#guard)
    - [Handheld Scanner](https://support.patronscan.com/faqs?hsLang=en#handheld-scanner)
    - [Web Admin Portal](https://support.patronscan.com/faqs?hsLang=en#web-admin-portal)
    - [DualPass](https://support.patronscan.com/faqs?hsLang=en#dualpass)
    - [Privacy](https://support.patronscan.com/faqs?hsLang=en#privacy)
- [Getting started](https://support.patronscan.com/getting-started?hsLang=en#main-content)

    - [DualPass](https://support.patronscan.com/getting-started?hsLang=en#dualpass)
    - [Guard +](https://support.patronscan.com/getting-started?hsLang=en#guard)
    - [AVA Camera](https://support.patronscan.com/getting-started?hsLang=en#ava-camera)
    - [HandHeld](https://support.patronscan.com/getting-started?hsLang=en#handheld)
    - [Admin Portal](https://support.patronscan.com/getting-started?hsLang=en#admin-portal)
- [Troubleshooting](https://support.patronscan.com/troubleshooting?hsLang=en#main-content)

    - [Patronscan APP](https://support.patronscan.com/troubleshooting?hsLang=en#patronscan-app)
    - [Repair](https://support.patronscan.com/troubleshooting?hsLang=en#repair)
    - [Guard](https://support.patronscan.com/troubleshooting?hsLang=en#guard)
    - [Kiosk](https://support.patronscan.com/troubleshooting?hsLang=en#kiosk)
- [Product Updates](https://support.patronscan.com/product-updates?hsLang=en)

[![Patronscan Logo Horizontal](https://support.patronscan.com/hs-fs/hubfs/Patronscan%20Logo%20Dec%202025%20BambooHR.png?width=250&height=39&name=Patronscan%20Logo%20Dec%202025%20BambooHR.png "Patronscan Logo Horizontal")](http://www.patronscan.com?hsLang=en)

Copyright © 2026, Patronscan