Law courses | University of Dundee, UK

Dentistry research degrees | University of Dundee, UK

Receptions | University of Dundee, UK

Staff support topics | University of Dundee, UK

Postgraduate | University of Dundee, UK

IT suites | University of Dundee, UK

Interdisciplinary research themes | University of Dundee, UK

Life Sciences projects | University of Dundee, UK

Physics courses | University of Dundee, UK

Urban planning research degrees | University of Dundee, UK

All `id` attributes on a page must be unique, or accessible technologies used by the page 
can stop working.

## Example

The duplicate `id` here makes it unclear which label belongs to which input field:

```html
<label for="name">Your name</label>
<input id="name">

<label for="name">Company name</label>
<input id="name">
```

As a result, accessible technologies like screen readers can fail to read out the 
correct text, or may read out no text at all.

Similar issues can occur when using `aria-labelledby` and `aria-describedby`.

## How to fix

Ensure all `id` attributes on a page are unique. 

## More information

See [Technique H93](https://www.w3.org/TR/2016/NOTE-WCAG20-TECHS-20161007/H93) 
for more information.

duplicate-id

September 2025

August 2025

University of Dundee

Title / URL	Issues
Law courses \| University of Dundee, UKwww.dundee.ac.uk/subjects/law	8
Dentistry research degrees \| University of Dundee, UKwww.dundee.ac.uk/postgraduate/research/dentistry	2
Receptions \| University of Dundee, UKwww.dundee.ac.uk/locations/receptions	2
Staff support topics \| University of Dundee, UKwww.dundee.ac.uk/hr/topics	2
Postgraduate \| University of Dundee, UKwww.dundee.ac.uk/postgraduate	2
IT suites \| University of Dundee, UKwww.dundee.ac.uk/locations/it-suites	2
Interdisciplinary research themes \| University of Dundee, UKwww.dundee.ac.uk/research/themes	2
Life Sciences projects \| University of Dundee, UKwww.dundee.ac.uk/projects/life-sciences	2
Physics courses \| University of Dundee, UKwww.dundee.ac.uk/subjects/physics	2
Urban planning research degrees \| University of Dundee, UKwww.dundee.ac.uk/postgraduate/research/urban-planning	2

Fix duplicate IDs

University of Dundee

Where this issue has occurred