Our courses

Can we look into your concern?

First time visit: View without clicking anything

About HSIB

Tell us what you think

invented-url-for-404-page

Support for patients and families

Healthcare Safety Investigation Branch

Contact us

Concerns, complaints and compliments

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

June 2025

May 2025

Title / URL	Issues
Our courseswww.hsib.org.uk/investigation-education/our-courses/	50
Can we look into your concern?www.hsib.org.uk/what-we-do/can-we-look-into-your-concern/	48
First time visit: View without clicking anythingwww.hsib.org.uk/	48
About HSIBwww.hsib.org.uk/who-we-are/about-hsib/	48
Tell us what you thinkwww.hsib.org.uk/tell-us-what-you-think/	48
invented-url-for-404-pagewww.hsib.org.uk/invented-url-for-404-page/	48
Support for patients and familieswww.hsib.org.uk/help-and-support/support-for-patients-and-families/	48
Healthcare Safety Investigation Branchwww.hsib.org.uk/	48
Contact uswww.hsib.org.uk/contact-us/	48
Concerns, complaints and complimentswww.hsib.org.uk/concerns-complaints-and-compliments/	48

Fix duplicate IDs

Healthcare Safety Investigation Branch

Where this issue has occurred