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CAPTCHA – Accessibility Guidelines

Accessibility GSA Section 508

If the purpose of non-text content is to confirm the content is being accessed by a person rather than a computer, then text alternatives that identify and describe the purpose of the non-text content are provided, and alternative forms of CAPTCHA using output modes for different types of sensory perception are provided to accommodate different disabilities.

Content/Design Considerations

  • If a CAPTCHA is used, require the CAPTCHA test to have a text alternative that describes its purpose, and require that an alternate form of the CAPTCHA, using a different modality, also be provided.

Development Considerations

  • Select a CAPTCHA provider that is already conformant to 508 standards. 3rd party CAPTCHA tools generally do not allow customization. Select a CAPTCHA that does not rely on images.