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Sources & notes
W3C recommends describing the page, intended action, barrier, and relevant technology. It explicitly allows incomplete technical details. Fillo turns that guidance into a form and keeps follow-up contact optional.
Offer this alongside an accessible alternative, such as email or phone, in case the form itself is a barrier.
Recreate the barrier and assess its effect on the reported task. Accept incomplete technical details. These reports support investigation; they do not replace a conformance audit.