Faculty of Arts and Science - Concordia University

Rankings - Concordia University

Faculty of Fine Arts - Concordia University

Gina Cody School of Engineering and Computer Science - Concordia University

Alumni & friends - Concordia University

School of Graduate Studies - Concordia University

School of Health | School of Health (SoH) - Concordia University

John Molson School of Business - Concordia University

The Campaign for Concordia - Concordia University

First time visit: View without clicking anything

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

December 2025

November 2025

Concordia University

	Title / URL	Issues
	Faculty of Arts and Science - Concordia Universitywww.concordia.ca/artsci.html	14
	Rankings - Concordia Universitywww.concordia.ca/about/rankings.html	10
	Faculty of Fine Arts - Concordia Universitywww.concordia.ca/finearts.html	8
	Gina Cody School of Engineering and Computer Science - Concordia Universitywww.concordia.ca/ginacody.html	8
	Alumni & friends - Concordia Universitywww.concordia.ca/alumni-friends.html	8
	School of Graduate Studies - Concordia Universitywww.concordia.ca/gradstudies.html	8
	School of Health \| School of Health (SoH) - Concordia Universitywww.concordia.ca/schoolofhealth.html	7
	John Molson School of Business - Concordia Universitywww.concordia.ca/jmsb.html	6
	The Campaign for Concordia - Concordia Universitywww.concordia.ca/campaign.html	5
	First time visit: View without clicking anythingwww.concordia.ca/	4

Fix duplicate IDs

Concordia University

Where this issue has occurred