Transportation | Mass.gov

Environment | Mass.gov

Arts | Mass.gov

Travel Options | Mass.gov

Voting | Mass.gov

Fishing & Hunting | Mass.gov

Housing & Property | Mass.gov

Unemployment | Mass.gov

Historic Sites | Mass.gov

Taxes | Mass.gov

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

State of Massachusetts

Title / URL	Issues
Transportation \| Mass.govwww.mass.gov/topics/transportation	6
Environment \| Mass.govwww.mass.gov/topics/environment	6
Arts \| Mass.govwww.mass.gov/topics/arts	6
Travel Options \| Mass.govwww.mass.gov/topics/travel-options	6
Voting \| Mass.govwww.mass.gov/topics/voting	6
Fishing & Hunting \| Mass.govwww.mass.gov/topics/fishing-hunting	6
Housing & Property \| Mass.govwww.mass.gov/topics/housing-property	6
Unemployment \| Mass.govwww.mass.gov/topics/unemployment	6
Historic Sites \| Mass.govwww.mass.gov/topics/historic-sites	6
Taxes \| Mass.govwww.mass.gov/topics/taxes	6

Fix duplicate IDs

State of Massachusetts

Where this issue has occurred