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Documentation of accessibility observations for Deutsche Telekom – Mobilfunk & OneShop

3.3.4 Error Prevention (Legal, Financial, Data) (AA) No error prevention on Handyankauf form

Priority: Critical Medium Page: Handy Verkaufen Observation Permalink
Observation Details

Handyankauf form does not implement error prevention. At least one of the following must be true for submitting data:

  • Reversible – Submissions are reversible.

  • Checked – Data entered by the user is checked for input errors and the user is provided an opportunity to correct them.

  • Confirmed – A mechanism is available for reviewing, confirming, and correcting information before finalizing the submission.

Remediation Notes

Ensure at least one of the mechanisms is implemented. A confirmation screen with summary of entered data and a possibility to correct information is ideal for the use-case.