Enquire Now | Study Here | The University of Aberdeen

About | The University of Aberdeen

Clearing | The University of Aberdeen

Help and Support | IT Services | The University of Aberdeen

Business Contacts | Working With Business | The University of Aberdeen

Quick Links | About | The University of Aberdeen

Festival of the Sea: Online Talk - Sea Monsters on Medieval and Renaissance Maps with Chet van Duzer | Events | The University of Aberdeen

Video | IT Services | The University of Aberdeen

Get Involved | Alumni Relations | The University of Aberdeen

Working With Business | The University of Aberdeen

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 Aberdeen

	Title / URL	Issues
	Enquire Now \| Study Here \| The University of Aberdeenwww.abdn.ac.uk/study/enquire-now/	4
	About \| The University of Aberdeenwww.abdn.ac.uk/about/	2
	Clearing \| The University of Aberdeenwww.abdn.ac.uk/clearing/	2
	Help and Support \| IT Services \| The University of Aberdeenwww.abdn.ac.uk/it/student/help/	2
	Business Contacts \| Working With Business \| The University of Aberdeenwww.abdn.ac.uk/business-info/contacts/	2
	Quick Links \| About \| The University of Aberdeenwww.abdn.ac.uk/about/quick-links/	2
	Festival of the Sea: Online Talk - Sea Monsters on Medieval and Renaissance Maps with Chet van Duzer \| Events \| The University of Aberdeenwww.abdn.ac.uk/events/22381/	2
	Video \| IT Services \| The University of Aberdeenwww.abdn.ac.uk/it/services/media/video/	2
	Get Involved \| Alumni Relations \| The University of Aberdeenwww.abdn.ac.uk/alumni/involved/	2
	Working With Business \| The University of Aberdeenwww.abdn.ac.uk/business-info/	2

Fix duplicate IDs

University of Aberdeen

Where this issue has occurred